[arm] Clean up the use of UNALIGNED_ACCESSES.

src/arm/macro-assembler-arm.cc

Index: src/arm/macro-assembler-arm.cc
diff --git a/src/arm/macro-assembler-arm.cc b/src/arm/macro-assembler-arm.cc
index 18b4a43d44e8c83d24e717c69295d8de5da3ce48..a08673d4620243d1e4c598e787f1517b0a629dd5 100644
--- a/src/arm/macro-assembler-arm.cc
+++ b/src/arm/macro-assembler-arm.cc
@@ -3378,17 +3378,7 @@ void MacroAssembler::CopyBytes(Register src,
   cmp(length, Operand(kPointerSize));
   b(lt, &byte_loop);
   ldr(scratch, MemOperand(src, kPointerSize, PostIndex));
-  if (CpuFeatures::IsSupported(UNALIGNED_ACCESSES)) {
-    str(scratch, MemOperand(dst, kPointerSize, PostIndex));
-  } else {
-    strb(scratch, MemOperand(dst, 1, PostIndex));
-    mov(scratch, Operand(scratch, LSR, 8));
-    strb(scratch, MemOperand(dst, 1, PostIndex));
-    mov(scratch, Operand(scratch, LSR, 8));
-    strb(scratch, MemOperand(dst, 1, PostIndex));
-    mov(scratch, Operand(scratch, LSR, 8));
-    strb(scratch, MemOperand(dst, 1, PostIndex));
-  }
+  str(scratch, MemOperand(dst, kPointerSize, PostIndex));
   sub(length, length, Operand(kPointerSize));
   b(&word_loop);