Remove broken %_Log functionality.

src/flag-definitions.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.
 
 // This file defines all of the flags.  It is separated into different section,
 // for Debug, Release, Logging and Profiling, etc.  To add a new flag, find the
 // correct section, and use one of the DEFINE_ macros, without a trailing ';'.
 //
 // This include does not have a guard, because it is a template-style include,
 // which can be included multiple times in different modes.  It expects to have
@@ skipping 756 matching lines @@
 //
 // Logging and profiling flags
 //
 #undef FLAG
 #define FLAG FLAG_FULL
 
 // log.cc
 DEFINE_bool(log, false,
             "Minimal logging (no API, code, GC, suspect, or handles samples).")
 DEFINE_bool(log_all, false, "Log all events to the log file.")
-DEFINE_bool(log_runtime, false, "Activate runtime system %Log call.")
 DEFINE_bool(log_api, false, "Log API events to the log file.")
 DEFINE_bool(log_code, false,
             "Log code events to the log file without profiling.")
 DEFINE_bool(log_gc, false,
             "Log heap samples on garbage collection for the hp2ps tool.")
 DEFINE_bool(log_handles, false, "Log global handle events.")
 DEFINE_bool(log_snapshot_positions, false,
             "log positions of (de)serialized objects in the snapshot.")
 DEFINE_bool(log_suspect, false, "Log suspect operations.")
 DEFINE_bool(prof, false,
@@ skipping 116 matching lines @@
 #undef DEFINE_ALIAS_float
 #undef DEFINE_ALIAS_args
 
 #undef FLAG_MODE_DECLARE
 #undef FLAG_MODE_DEFINE
 #undef FLAG_MODE_DEFINE_DEFAULTS
 #undef FLAG_MODE_META
 #undef FLAG_MODE_DEFINE_IMPLICATIONS
 
 #undef COMMA