Remove broken %_Log functionality.

src/log.h

 // Copyright 2012 the V8 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.
 
 #ifndef V8_LOG_H_
 #define V8_LOG_H_
 
 #include "allocation.h"
 #include "objects.h"
 #include "platform.h"
@@ skipping 308 matching lines @@
    private:
     Isolate* isolate_;
     const char* name_;
   };
 
   // ==== Events logged by --log-regexp ====
   // Regexp compilation and execution events.
 
   void RegExpCompileEvent(Handle<JSRegExp> regexp, bool in_cache);
 
-  // Log an event reported from generated code
-  void LogRuntime(Vector<const char> format, Handle<JSArray> args);
-
   bool is_logging() {
     return is_logging_;
   }
 
   bool is_logging_code_events() {
     return is_logging() || jit_logger_ != NULL;
   }
 
   // Stop collection of profiling data.
   // When data collection is paused, CPU Tick events are discarded.
@@ skipping 176 matching lines @@
                                  int length) = 0;
 
   NameBuffer* name_buffer_;
 };
 
 
 } }  // namespace v8::internal
 
 
 #endif  // V8_LOG_H_