[intrinsics] Nuke %HasCachedArrayIndex and %GetCachedArrayIndex.

src/x64/macro-assembler-x64.cc

Index: src/x64/macro-assembler-x64.cc
diff --git a/src/x64/macro-assembler-x64.cc b/src/x64/macro-assembler-x64.cc
index 6bd62d065226dc2b3b0235863914f85e9212f853..0a739dacfb0c472ee72de508b5c4552852cc4086 100644
--- a/src/x64/macro-assembler-x64.cc
+++ b/src/x64/macro-assembler-x64.cc
@@ -676,20 +676,6 @@ bool MacroAssembler::AllowThisStubCall(CodeStub* stub) {
   return has_frame_ || !stub->SometimesSetsUpAFrame();
 }
 
-
-void MacroAssembler::IndexFromHash(Register hash, Register index) {
-  // The assert checks that the constants for the maximum number of digits
-  // for an array index cached in the hash field and the number of bits
-  // reserved for it does not conflict.
-  DCHECK(TenToThe(String::kMaxCachedArrayIndexLength) <
-         (1 << String::kArrayIndexValueBits));
-  if (!hash.is(index)) {
-    movl(index, hash);
-  }
-  DecodeFieldToSmi<String::ArrayIndexValueBits>(index);
-}
-
-
 void MacroAssembler::CallRuntime(const Runtime::Function* f,
                                  int num_arguments,
                                  SaveFPRegsMode save_doubles) {