removed spurious grpc_library.cc
diff --git a/tools/doxygen/Doxyfile.c++.internal b/tools/doxygen/Doxyfile.c++.internal
index 6a41c80..554fcec 100644
--- a/tools/doxygen/Doxyfile.c++.internal
+++ b/tools/doxygen/Doxyfile.c++.internal
@@ -805,16 +805,17 @@
include/grpc++/support/sync_stream.h \
include/grpc++/support/time.h \
src/cpp/client/secure_credentials.h \
+src/cpp/common/core_codegen.h \
src/cpp/common/secure_auth_context.h \
src/cpp/server/secure_server_credentials.h \
src/cpp/client/create_channel_internal.h \
+src/cpp/common/core_codegen.h \
src/cpp/common/create_auth_context.h \
src/cpp/server/dynamic_thread_pool.h \
src/cpp/server/thread_pool_interface.h \
src/cpp/client/secure_credentials.cc \
src/cpp/common/auth_property_iterator.cc \
src/cpp/common/core_codegen.cc \
-src/cpp/common/grpc_library.cc \
src/cpp/common/secure_auth_context.cc \
src/cpp/common/secure_channel_arguments.cc \
src/cpp/common/secure_create_auth_context.cc \