[arm] Clean up the use of UNALIGNED_ACCESSES.

src/regexp/arm/regexp-macro-assembler-arm.cc

 // 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.
 
 #if V8_TARGET_ARCH_ARM
 
 #include "src/regexp/arm/regexp-macro-assembler-arm.h"
 
 #include "src/code-stubs.h"
 #include "src/log.h"
@@ skipping 1182 matching lines @@
 void RegExpMacroAssemblerARM::CheckStackLimit() {
   ExternalReference stack_limit =
       ExternalReference::address_of_regexp_stack_limit(isolate());
   __ mov(r0, Operand(stack_limit));
   __ ldr(r0, MemOperand(r0));
   __ cmp(backtrack_stackpointer(), Operand(r0));
   SafeCall(&stack_overflow_label_, ls);
 }
 
 
-bool RegExpMacroAssemblerARM::CanReadUnaligned() {
-  return CpuFeatures::IsSupported(UNALIGNED_ACCESSES) && !slow_safe();
-}
-
-
 void RegExpMacroAssemblerARM::LoadCurrentCharacterUnchecked(int cp_offset,
                                                             int characters) {
   Register offset = current_input_offset();
   if (cp_offset != 0) {
     // r4 is not being used to store the capture start index at this point.
     __ add(r4, current_input_offset(), Operand(cp_offset * char_size()));
     offset = r4;
   }
   // The ldr, str, ldrh, strh instructions can do unaligned accesses, if the CPU
   // and the operating system running on the target allow it.
@@ skipping 25 matching lines @@
 
 
 #undef __
 
 #endif  // V8_INTERPRETED_REGEXP
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM