RegExp: Remove unnecessary function from ARM specific code and convert condition to assertion.

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

Index: src/arm/regexp-macro-assembler-arm.cc
diff --git a/src/arm/regexp-macro-assembler-arm.cc b/src/arm/regexp-macro-assembler-arm.cc
index 63f47f67edea620db9bdfe4d40c93a3d3190453d..252d7839fbf4e863e12eebcf4f2d659a19580ed3 100644
--- a/src/arm/regexp-macro-assembler-arm.cc
+++ b/src/arm/regexp-macro-assembler-arm.cc
@@ -132,15 +132,6 @@ int RegExpMacroAssemblerARM::stack_limit_slack()  {
 }
 
 
-bool RegExpMacroAssemblerARM::CanReadUnaligned() {
-#if V8_TARGET_CAN_READ_UNALIGNED
-  return true;
-#else
-  return false;
-#endif
-}
-
-
 void RegExpMacroAssemblerARM::AdvanceCurrentPosition(int by) {
   if (by != 0) {
     Label inside_string;