Remove unused and rarely used LOG_ macros.

webrtc/system_wrappers/source/logging_unittest.cc

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 54 matching lines @@
   {
     CriticalSectionScoped cs(crit_.get());
     level_ = kTraceWarning;
     std::string msg = "Important message";
     expected_log_ << "(logging_unittest.cc:" << __LINE__ + 1 << "): " << msg;
     LOG(LS_WARNING) << msg;
     cv_->SleepCS(*crit_.get(), 2000);
   }
 }
 
-TEST_F(LoggingTest, LogFunctionError) {
-  {
-    CriticalSectionScoped cs(crit_.get());
-    int bar = 42;
-    int baz = 99;
-    level_ = kTraceError;
-    expected_log_ << "(logging_unittest.cc:" << __LINE__ + 2
-                  << "): Foo failed: bar=" << bar << ", baz=" << baz;
-    LOG_FERR2(LS_ERROR, Foo, bar, baz);
-    cv_->SleepCS(*crit_.get(), 2000);
-  }
-}
-
 }  // namespace
 }  // namespace webrtc