Remove dangerous logging from OEMCrypto Reference code

Merge from Widevine repo of http://go/wvgerrit/57584

This CL is part of the long slog to split the mock into safer
reference code and dangerous test code.

bug: 76393338 (Step 4) Split mock into reference code and testbed
bug: 36515266 OEMCrypto Logging Cleanup

test: unit tests
Change-Id: Idbbf704a5947e2f161af7b71c328423f02982378

libwvdrmengine/oemcrypto/ref/src/oemcrypto_auth_ref.cpp

@@ -11,7 +11,6 @@
 #include "keys.h"
 #include "log.h"
 #include "oemcrypto_key_ref.h"
-#include "oemcrypto_logging.h"
 #include "oemcrypto_rsa_key_shared.h"
 
 namespace {