Killing off QUICv12, including cleaning out all of the code for handling

net/quic/test_tools/quic_test_utils.cc

Index: net/quic/test_tools/quic_test_utils.cc
diff --git a/net/quic/test_tools/quic_test_utils.cc b/net/quic/test_tools/quic_test_utils.cc
index 904cf761202b38592a7a6bc939ae1d6319531e84..bddfc6320e82b25fc852c0ccd163a1d1120c4fd0 100644
--- a/net/quic/test_tools/quic_test_utils.cc
+++ b/net/quic/test_tools/quic_test_utils.cc
@@ -571,14 +571,5 @@ QuicVersionVector SupportedVersions(QuicVersion version) {
   return versions;
 }
 
-bool TestDecompressorVisitor::OnDecompressedData(StringPiece data) {
-  data.AppendToString(&data_);
-  return true;
-}
-
-void TestDecompressorVisitor::OnDecompressionError() {
-  error_ = true;
-}
-
 }  // namespace test
 }  // namespace net