Remove obsolete TODOs about converting char uint8_t.

PiperOrigin-RevId: 698569259

quiche/common/quiche_data_reader.h

diff --git a/quiche/common/quiche_data_reader.h b/quiche/common/quiche_data_reader.h
index 43e9c1d..3694d34 100644
--- a/quiche/common/quiche_data_reader.h
+++ b/quiche/common/quiche_data_reader.h
@@ -208,8 +208,6 @@
   quiche::Endianness endianness() const { return endianness_; }
 
  private:
-  // TODO(fkastenholz, b/73004262) change buffer_, et al, to be uint8_t, not
-  // char. The data buffer that we're reading from.
   const char* data_;
 
   // The length of the data buffer that we're reading from.

quiche/common/quiche_data_writer.h

diff --git a/quiche/common/quiche_data_writer.h b/quiche/common/quiche_data_writer.h
index bb691cd..7af29b0 100644
--- a/quiche/common/quiche_data_writer.h
+++ b/quiche/common/quiche_data_writer.h
@@ -137,8 +137,6 @@
   }
 
  private:
-  // TODO(fkastenholz, b/73004262) change buffer_, et al, to be uint8_t, not
-  // char.
   char* buffer_;
   size_t capacity_;  // Allocation size of payload (or -1 if buffer is const).
   size_t length_;    // Current length of the buffer.