Remove now useless QUIC method AdjustErrorForVersion() which has been a no-op for some time.

net/quic/chromium/quic_stream_factory_test.cc

Index: net/quic/chromium/quic_stream_factory_test.cc
diff --git a/net/quic/chromium/quic_stream_factory_test.cc b/net/quic/chromium/quic_stream_factory_test.cc
index e7c05d0c09b60b6fa065a908e5682de9b6a94c38..2be7960e48a182aec99401d40fad985c454cb0fc 100644
--- a/net/quic/chromium/quic_stream_factory_test.cc
+++ b/net/quic/chromium/quic_stream_factory_test.cc
@@ -390,9 +390,8 @@ class QuicStreamFactoryTestBase {
 
   std::unique_ptr<QuicEncryptedPacket> ConstructClientRstPacket() {
     QuicStreamId stream_id = kClientDataStreamId1;
-    return client_maker_.MakeRstPacket(
-        1, true, stream_id,
-        AdjustErrorForVersion(QUIC_RST_ACKNOWLEDGEMENT, version_));
+    return client_maker_.MakeRstPacket(1, true, stream_id,
+                                       QUIC_RST_ACKNOWLEDGEMENT);
   }
 
   static ProofVerifyDetailsChromium DefaultProofVerifyDetails() {