diff --git a/quic/core/qpack/qpack_blocking_manager.cc b/quic/core/qpack/qpack_blocking_manager.cc
index ffec172..3544f1c 100644
--- a/quic/core/qpack/qpack_blocking_manager.cc
+++ b/quic/core/qpack/qpack_blocking_manager.cc
@@ -24,7 +24,7 @@
 
   const uint64_t required_index_count = RequiredInsertCount(indices);
   if (known_received_count_ < required_index_count) {
-    IncreaseKnownReceivedCountTo(required_index_count);
+    known_received_count_ = required_index_count;
   }
 
   DecreaseReferenceCounts(indices);
@@ -56,7 +56,7 @@
     return false;
   }
 
-  IncreaseKnownReceivedCountTo(known_received_count_ + increment);
+  known_received_count_ += increment;
   return true;
 }
 
@@ -68,16 +68,6 @@
   header_blocks_[stream_id].push_back(std::move(indices));
 }
 
-void QpackBlockingManager::OnReferenceSentOnEncoderStream(
-    uint64_t inserted_index,
-    uint64_t referred_index) {
-  auto result = unacked_encoder_stream_references_.insert(
-      {inserted_index, referred_index});
-  // Each dynamic table entry can refer to at most one |referred_index|.
-  DCHECK(result.second);
-  IncreaseReferenceCounts({referred_index});
-}
-
 bool QpackBlockingManager::blocking_allowed_on_stream(
     QuicStreamId stream_id,
     uint64_t maximum_blocked_streams) const {
@@ -141,26 +131,6 @@
   return *indices.rbegin() + 1;
 }
 
-void QpackBlockingManager::IncreaseKnownReceivedCountTo(
-    uint64_t new_known_received_count) {
-  DCHECK_GT(new_known_received_count, known_received_count_);
-
-  known_received_count_ = new_known_received_count;
-
-  // Remove referred indices with key less than new Known Received Count from
-  // |unacked_encoder_stream_references_| and |entry_reference_counts_|.
-  IndexSet acknowledged_references;
-  auto it = unacked_encoder_stream_references_.begin();
-  while (it != unacked_encoder_stream_references_.end() &&
-         it->first < known_received_count_) {
-    acknowledged_references.insert(it->second);
-    ++it;
-  }
-  unacked_encoder_stream_references_.erase(
-      unacked_encoder_stream_references_.begin(), it);
-  DecreaseReferenceCounts(acknowledged_references);
-}
-
 void QpackBlockingManager::IncreaseReferenceCounts(const IndexSet& indices) {
   for (const uint64_t index : indices) {
     auto it = entry_reference_counts_.lower_bound(index);
diff --git a/quic/core/qpack/qpack_blocking_manager.h b/quic/core/qpack/qpack_blocking_manager.h
index 60f7db7..6d2df9c 100644
--- a/quic/core/qpack/qpack_blocking_manager.h
+++ b/quic/core/qpack/qpack_blocking_manager.h
@@ -48,12 +48,6 @@
   // entries with |indices|.  |indices| must not be empty.
   void OnHeaderBlockSent(QuicStreamId stream_id, IndexSet indices);
 
-  // Called when sending Insert With Name Reference or Duplicate instruction on
-  // encoder stream, inserting entry |inserted_index| referring to
-  // |referred_index|.
-  void OnReferenceSentOnEncoderStream(uint64_t inserted_index,
-                                      uint64_t referred_index);
-
   // Returns true if sending blocking references on stream |stream_id| would not
   // increase the total number of blocked streams above
   // |maximum_blocked_streams|.  Note that if |stream_id| is already blocked
@@ -85,11 +79,6 @@
   using HeaderBlocksForStream = std::list<IndexSet>;
   using HeaderBlocks = QuicUnorderedMap<QuicStreamId, HeaderBlocksForStream>;
 
-  // Increases |known_received_count_| to |new_known_received_count|, which must
-  // me larger than |known_received_count_|.  Removes acknowledged references
-  // from |unacked_encoder_stream_references_|.
-  void IncreaseKnownReceivedCountTo(uint64_t new_known_received_count);
-
   // Increase or decrease the reference count for each index in |indices|.
   void IncreaseReferenceCounts(const IndexSet& indices);
   void DecreaseReferenceCounts(const IndexSet& indices);
@@ -98,13 +87,7 @@
   // Must not contain a stream id with an empty queue.
   HeaderBlocks header_blocks_;
 
-  // Unacknowledged references on the encoder stream.
-  // The key is the absolute index of the inserted entry,
-  // the mapped value is the absolute index of the entry referred.
-  std::map<uint64_t, uint64_t> unacked_encoder_stream_references_;
-
-  // Number of references in |header_blocks_| and
-  // |unacked_encoder_stream_references_| for each entry index.
+  // Number of references in |header_blocks_| for each entry index.
   std::map<uint64_t, uint64_t> entry_reference_counts_;
 
   uint64_t known_received_count_;
diff --git a/quic/core/qpack/qpack_blocking_manager_test.cc b/quic/core/qpack/qpack_blocking_manager_test.cc
index 64bfb97..d92dda5 100644
--- a/quic/core/qpack/qpack_blocking_manager_test.cc
+++ b/quic/core/qpack/qpack_blocking_manager_test.cc
@@ -236,88 +236,6 @@
             manager_.smallest_blocking_index());
 }
 
-TEST_F(QpackBlockingManagerTest,
-       ReferenceOnEncoderStreamUnblockedByInsertCountIncrement) {
-  EXPECT_EQ(0u, manager_.known_received_count());
-  EXPECT_EQ(std::numeric_limits<uint64_t>::max(),
-            manager_.smallest_blocking_index());
-
-  // Entry 1 refers to entry 0.
-  manager_.OnReferenceSentOnEncoderStream(1, 0);
-  // Entry 2 also refers to entry 0.
-  manager_.OnReferenceSentOnEncoderStream(2, 0);
-
-  EXPECT_EQ(0u, manager_.known_received_count());
-  EXPECT_EQ(0u, manager_.smallest_blocking_index());
-
-  // Acknowledging entry 1 still leaves one unacknowledged reference to entry 0.
-  EXPECT_TRUE(manager_.OnInsertCountIncrement(2));
-
-  EXPECT_EQ(2u, manager_.known_received_count());
-  EXPECT_EQ(0u, manager_.smallest_blocking_index());
-
-  // Entry 3 also refers to entry 2.
-  manager_.OnReferenceSentOnEncoderStream(3, 2);
-
-  EXPECT_EQ(2u, manager_.known_received_count());
-  EXPECT_EQ(0u, manager_.smallest_blocking_index());
-
-  // Acknowledging entry 2 removes last reference to entry 0.
-  EXPECT_TRUE(manager_.OnInsertCountIncrement(1));
-
-  EXPECT_EQ(3u, manager_.known_received_count());
-  EXPECT_EQ(2u, manager_.smallest_blocking_index());
-
-  // Acknowledging entry 4 (and implicitly 3) removes reference to entry 2.
-  EXPECT_TRUE(manager_.OnInsertCountIncrement(2));
-
-  EXPECT_EQ(5u, manager_.known_received_count());
-  EXPECT_EQ(std::numeric_limits<uint64_t>::max(),
-            manager_.smallest_blocking_index());
-}
-
-TEST_F(QpackBlockingManagerTest,
-       ReferenceOnEncoderStreamUnblockedByHeaderAcknowledgement) {
-  EXPECT_EQ(0u, manager_.known_received_count());
-  EXPECT_EQ(std::numeric_limits<uint64_t>::max(),
-            manager_.smallest_blocking_index());
-
-  // Entry 1 refers to entry 0.
-  manager_.OnReferenceSentOnEncoderStream(1, 0);
-  // Entry 2 also refers to entry 0.
-  manager_.OnReferenceSentOnEncoderStream(2, 0);
-
-  EXPECT_EQ(0u, manager_.known_received_count());
-  EXPECT_EQ(0u, manager_.smallest_blocking_index());
-
-  // Acknowledging a header block with entries up to 1 still leave one
-  // unacknowledged reference to entry 0.
-  manager_.OnHeaderBlockSent(/* stream_id = */ 0, {0, 1});
-  manager_.OnHeaderAcknowledgement(/* stream_id = */ 0);
-
-  EXPECT_EQ(2u, manager_.known_received_count());
-  EXPECT_EQ(0u, manager_.smallest_blocking_index());
-
-  // Entry 3 also refers to entry 2.
-  manager_.OnReferenceSentOnEncoderStream(3, 2);
-
-  // Acknowledging a header block with entries up to 2 removes last reference to
-  // entry 0.
-  manager_.OnHeaderBlockSent(/* stream_id = */ 0, {2, 0, 2});
-  manager_.OnHeaderAcknowledgement(/* stream_id = */ 0);
-
-  EXPECT_EQ(3u, manager_.known_received_count());
-  EXPECT_EQ(2u, manager_.smallest_blocking_index());
-
-  // Acknowledging entry 4 (and implicitly 3) removes reference to entry 2.
-  manager_.OnHeaderBlockSent(/* stream_id = */ 0, {1, 4, 2, 0});
-  manager_.OnHeaderAcknowledgement(/* stream_id = */ 0);
-
-  EXPECT_EQ(5u, manager_.known_received_count());
-  EXPECT_EQ(std::numeric_limits<uint64_t>::max(),
-            manager_.smallest_blocking_index());
-}
-
 TEST_F(QpackBlockingManagerTest, BlockingAllowedOnStream) {
   const QuicStreamId kStreamId1 = 1;
   const QuicStreamId kStreamId2 = 2;
diff --git a/quic/core/qpack/qpack_encoder.cc b/quic/core/qpack/qpack_encoder.cc
index 319af82..599c575 100644
--- a/quic/core/qpack/qpack_encoder.cc
+++ b/quic/core/qpack/qpack_encoder.cc
@@ -159,8 +159,6 @@
                 QpackAbsoluteIndexToEncoderStreamRelativeIndex(
                     index, header_table_.inserted_entry_count()));
             auto entry = header_table_.InsertEntry(name, value);
-            blocking_manager_.OnReferenceSentOnEncoderStream(
-                entry->InsertionIndex(), index);
             instructions.push_back(EncodeIndexedHeaderField(
                 is_static, entry->InsertionIndex(), referred_indices));
             smallest_blocking_index = std::min(smallest_blocking_index, index);
@@ -218,8 +216,6 @@
                   index, header_table_.inserted_entry_count()),
               value);
           auto entry = header_table_.InsertEntry(name, value);
-          blocking_manager_.OnReferenceSentOnEncoderStream(
-              entry->InsertionIndex(), index);
           instructions.push_back(EncodeIndexedHeaderField(
               is_static, entry->InsertionIndex(), referred_indices));
           smallest_blocking_index = std::min(smallest_blocking_index, index);