[cleanup] Delete MacroAssembler::CopyBytes, it is dead code

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 566fdf14f2ced34c15d052cbd1941f330c35629b..6f55d4ae3240211fa9bd151403ef447c28843447 100644
--- a/src/arm/macro-assembler-arm.cc
+++ b/src/arm/macro-assembler-arm.cc
@@ -3245,50 +3245,6 @@ void MacroAssembler::AllocateJSValue(Register result, Register constructor,
   STATIC_ASSERT(JSValue::kSize == 4 * kPointerSize);
 }
 
-
-void MacroAssembler::CopyBytes(Register src,
-                               Register dst,
-                               Register length,
-                               Register scratch) {
-  Label align_loop_1, word_loop, byte_loop, byte_loop_1, done;
-
-  // Align src before copying in word size chunks.
-  cmp(length, Operand(kPointerSize));
-  b(le, &byte_loop);
-
-  bind(&align_loop_1);
-  tst(src, Operand(kPointerSize - 1));
-  b(eq, &word_loop);
-  ldrb(scratch, MemOperand(src, 1, PostIndex));
-  strb(scratch, MemOperand(dst, 1, PostIndex));
-  sub(length, length, Operand(1), SetCC);
-  b(&align_loop_1);
-  // Copy bytes in word size chunks.
-  bind(&word_loop);
-  if (emit_debug_code()) {
-    tst(src, Operand(kPointerSize - 1));
-    Assert(eq, kExpectingAlignmentForCopyBytes);
-  }
-  cmp(length, Operand(kPointerSize));
-  b(lt, &byte_loop);
-  ldr(scratch, MemOperand(src, kPointerSize, PostIndex));
-  str(scratch, MemOperand(dst, kPointerSize, PostIndex));
-  sub(length, length, Operand(kPointerSize));
-  b(&word_loop);
-
-  // Copy the last bytes if any left.
-  bind(&byte_loop);
-  cmp(length, Operand::Zero());
-  b(eq, &done);
-  bind(&byte_loop_1);
-  ldrb(scratch, MemOperand(src, 1, PostIndex));
-  strb(scratch, MemOperand(dst, 1, PostIndex));
-  sub(length, length, Operand(1), SetCC);
-  b(ne, &byte_loop_1);
-  bind(&done);
-}
-
-
 void MacroAssembler::InitializeFieldsWithFiller(Register current_address,
                                                 Register end_address,
                                                 Register filler) {