[arm] Remove --enable-movw-movt.

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 553 matching lines @@
 DEFINE_BOOL(enable_avx, true, "enable use of AVX instructions if available")
 DEFINE_BOOL(enable_fma3, true, "enable use of FMA3 instructions if available")
 DEFINE_BOOL(enable_bmi1, true, "enable use of BMI1 instructions if available")
 DEFINE_BOOL(enable_bmi2, true, "enable use of BMI2 instructions if available")
 DEFINE_BOOL(enable_lzcnt, true, "enable use of LZCNT instruction if available")
 DEFINE_BOOL(enable_popcnt, true,
             "enable use of POPCNT instruction if available")
 DEFINE_STRING(arm_arch, ARM_ARCH_DEFAULT,
               "generate instructions for the selected ARM architecture if "
               "available: armv6, armv7, armv7+sudiv or armv8")
-DEFINE_BOOL(enable_movw_movt, false,
-            "prefer to load 32-bit constants using movw/movt instruction pairs "
-            "(ARM only)")
 DEFINE_BOOL(enable_vldr_imm, false,
             "enable use of constant pools for double immediate (ARM only)")
 DEFINE_BOOL(force_long_branches, false,
             "force all emitted branches to be in long mode (MIPS/PPC only)")
 DEFINE_STRING(mcpu, "auto", "enable optimization for specific cpu")
 
 // Deprecated ARM flags (replaced by arm_arch).
 DEFINE_MAYBE_BOOL(enable_armv7, "deprecated (use --arm_arch instead)")
 DEFINE_MAYBE_BOOL(enable_vfp3, "deprecated (use --arm_arch instead)")
 DEFINE_MAYBE_BOOL(enable_32dregs, "deprecated (use --arm_arch instead)")
@@ skipping 623 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