Remove unused and rarely used LOG_ macros.

webrtc/system_wrappers/source/logging_unittest.cc

Index: webrtc/system_wrappers/source/logging_unittest.cc
diff --git a/webrtc/system_wrappers/source/logging_unittest.cc b/webrtc/system_wrappers/source/logging_unittest.cc
index 633d84b76bab03e874d430fcd7f39988dec57f70..2da24b26f443ffeb912b0d6b987e1f278757a04a 100644
--- a/webrtc/system_wrappers/source/logging_unittest.cc
+++ b/webrtc/system_wrappers/source/logging_unittest.cc
@@ -72,18 +72,5 @@ TEST_F(LoggingTest, LogStream) {
   }
 }
 
-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