diff --git a/common/platform/api/quiche_str_cat.h b/common/platform/api/quiche_str_cat.h
index 36d054f..b996401 100644
--- a/common/platform/api/quiche_str_cat.h
+++ b/common/platform/api/quiche_str_cat.h
@@ -12,12 +12,6 @@
 
 namespace quiche {
 
-// Merges given strings or numbers with no delimiter.
-template <typename... Args>
-inline std::string QuicheStrCat(const Args&... args) {
-  return quiche::QuicheStrCatImpl(std::forward<const Args&>(args)...);
-}
-
 template <typename... Args>
 inline std::string QuicheStringPrintf(const Args&... args) {
   return QuicheStringPrintfImpl(std::forward<const Args&>(args)...);
diff --git a/common/platform/api/quiche_str_cat_test.cc b/common/platform/api/quiche_str_cat_test.cc
deleted file mode 100644
index c9a5bfc..0000000
--- a/common/platform/api/quiche_str_cat_test.cc
+++ /dev/null
@@ -1,169 +0,0 @@
-// Copyright (c) 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "net/third_party/quiche/src/common/platform/api/quiche_str_cat.h"
-
-#include <string>
-
-#include "absl/strings/string_view.h"
-#include "net/third_party/quiche/src/common/platform/api/quiche_test.h"
-
-namespace quiche {
-namespace test {
-namespace {
-
-class QuicheStrCatTest : public QuicheTest {};
-
-TEST_F(QuicheStrCatTest, Ints) {
-  const int16_t s = -1;
-  const uint16_t us = 2;
-  const int i = -3;
-  const uint32_t ui = 4;
-  const int64_t l = -5;
-  const uint64_t ul = 6;
-  const ptrdiff_t ptrdiff = -7;
-  const size_t size = 8;
-  const intptr_t intptr = -9;
-  const uintptr_t uintptr = 10;
-  std::string answer;
-  answer = QuicheStrCat(s, us);
-  EXPECT_EQ(answer, "-12");
-  answer = QuicheStrCat(i, ui);
-  EXPECT_EQ(answer, "-34");
-  answer = QuicheStrCat(l, ul);
-  EXPECT_EQ(answer, "-56");
-  answer = QuicheStrCat(ptrdiff, size);
-  EXPECT_EQ(answer, "-78");
-  answer = QuicheStrCat(size, intptr);
-  EXPECT_EQ(answer, "8-9");
-  answer = QuicheStrCat(uintptr, 0);
-  EXPECT_EQ(answer, "100");
-}
-
-TEST_F(QuicheStrCatTest, Basics) {
-  std::string result;
-
-  std::string strs[] = {"Hello", "Cruel", "World"};
-
-  absl::string_view pieces[] = {"Hello", "Cruel", "World"};
-
-  const char* c_strs[] = {"Hello", "Cruel", "World"};
-
-  int32_t i32s[] = {'H', 'C', 'W'};
-  uint64_t ui64s[] = {12345678910LL, 10987654321LL};
-
-  result = QuicheStrCat(false, true, 2, 3);
-  EXPECT_EQ(result, "0123");
-
-  result = QuicheStrCat(-1);
-  EXPECT_EQ(result, "-1");
-
-  result = QuicheStrCat(0.5);
-  EXPECT_EQ(result, "0.5");
-
-  result = QuicheStrCat(strs[1], pieces[2]);
-  EXPECT_EQ(result, "CruelWorld");
-
-  result = QuicheStrCat(strs[0], ", ", pieces[2]);
-  EXPECT_EQ(result, "Hello, World");
-
-  result = QuicheStrCat(strs[0], ", ", strs[1], " ", strs[2], "!");
-  EXPECT_EQ(result, "Hello, Cruel World!");
-
-  result = QuicheStrCat(pieces[0], ", ", pieces[1], " ", pieces[2]);
-  EXPECT_EQ(result, "Hello, Cruel World");
-
-  result = QuicheStrCat(c_strs[0], ", ", c_strs[1], " ", c_strs[2]);
-  EXPECT_EQ(result, "Hello, Cruel World");
-
-  result = QuicheStrCat("ASCII ", i32s[0], ", ", i32s[1], " ", i32s[2], "!");
-  EXPECT_EQ(result, "ASCII 72, 67 87!");
-
-  result = QuicheStrCat(ui64s[0], ", ", ui64s[1], "!");
-  EXPECT_EQ(result, "12345678910, 10987654321!");
-
-  std::string one = "1";
-  result = QuicheStrCat("And a ", one.size(), " and a ",
-                        &result[2] - &result[0], " and a ", one, " 2 3 4", "!");
-  EXPECT_EQ(result, "And a 1 and a 2 and a 1 2 3 4!");
-
-  result =
-      QuicheStrCat("To output a char by ASCII/numeric value, use +: ", '!' + 0);
-  EXPECT_EQ(result, "To output a char by ASCII/numeric value, use +: 33");
-
-  float f = 10000.5;
-  result = QuicheStrCat("Ten K and a half is ", f);
-  EXPECT_EQ(result, "Ten K and a half is 10000.5");
-
-  double d = 99999.9;
-  result = QuicheStrCat("This double number is ", d);
-  EXPECT_EQ(result, "This double number is 99999.9");
-
-  result = QuicheStrCat(1, 22, 333, 4444, 55555, 666666, 7777777, 88888888,
-                        999999999);
-  EXPECT_EQ(result, "122333444455555666666777777788888888999999999");
-}
-
-TEST_F(QuicheStrCatTest, MaxArgs) {
-  std::string result;
-  // Test 10 up to 26 arguments, the current maximum
-  result = QuicheStrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a");
-  EXPECT_EQ(result, "123456789a");
-  result = QuicheStrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b");
-  EXPECT_EQ(result, "123456789ab");
-  result = QuicheStrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c");
-  EXPECT_EQ(result, "123456789abc");
-  result = QuicheStrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d");
-  EXPECT_EQ(result, "123456789abcd");
-  result = QuicheStrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d", "e");
-  EXPECT_EQ(result, "123456789abcde");
-  result =
-      QuicheStrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d", "e", "f");
-  EXPECT_EQ(result, "123456789abcdef");
-  result = QuicheStrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d", "e", "f",
-                        "g");
-  EXPECT_EQ(result, "123456789abcdefg");
-  result = QuicheStrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d", "e", "f",
-                        "g", "h");
-  EXPECT_EQ(result, "123456789abcdefgh");
-  result = QuicheStrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d", "e", "f",
-                        "g", "h", "i");
-  EXPECT_EQ(result, "123456789abcdefghi");
-  result = QuicheStrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d", "e", "f",
-                        "g", "h", "i", "j");
-  EXPECT_EQ(result, "123456789abcdefghij");
-  result = QuicheStrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d", "e", "f",
-                        "g", "h", "i", "j", "k");
-  EXPECT_EQ(result, "123456789abcdefghijk");
-  result = QuicheStrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d", "e", "f",
-                        "g", "h", "i", "j", "k", "l");
-  EXPECT_EQ(result, "123456789abcdefghijkl");
-  result = QuicheStrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d", "e", "f",
-                        "g", "h", "i", "j", "k", "l", "m");
-  EXPECT_EQ(result, "123456789abcdefghijklm");
-  result = QuicheStrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d", "e", "f",
-                        "g", "h", "i", "j", "k", "l", "m", "n");
-  EXPECT_EQ(result, "123456789abcdefghijklmn");
-  result = QuicheStrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d", "e", "f",
-                        "g", "h", "i", "j", "k", "l", "m", "n", "o");
-  EXPECT_EQ(result, "123456789abcdefghijklmno");
-  result = QuicheStrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d", "e", "f",
-                        "g", "h", "i", "j", "k", "l", "m", "n", "o", "p");
-  EXPECT_EQ(result, "123456789abcdefghijklmnop");
-  result = QuicheStrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d", "e", "f",
-                        "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q");
-  EXPECT_EQ(result, "123456789abcdefghijklmnopq");
-  // No limit thanks to C++11's variadic templates
-  result = QuicheStrCat(
-      1, 2, 3, 4, 5, 6, 7, 8, 9, 10, "a", "b", "c", "d", "e", "f", "g", "h",
-      "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w",
-      "x", "y", "z", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L",
-      "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z");
-  EXPECT_EQ(result,
-            "12345678910abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ");
-}
-
-}  // namespace
-}  // namespace test
-}  // namespace quiche