[intrinsics] Nuke %HasCachedArrayIndex and %GetCachedArrayIndex.

src/mips64/macro-assembler-mips64.cc

Index: src/mips64/macro-assembler-mips64.cc
diff --git a/src/mips64/macro-assembler-mips64.cc b/src/mips64/macro-assembler-mips64.cc
index cb94b3f96564be8b49431d99585580627dcee7e4..3185285a461e500b895967a4a0de59901e7b0f3c 100644
--- a/src/mips64/macro-assembler-mips64.cc
+++ b/src/mips64/macro-assembler-mips64.cc
@@ -5462,18 +5462,6 @@ bool MacroAssembler::AllowThisStubCall(CodeStub* stub) {
   return has_frame_ || !stub->SometimesSetsUpAFrame();
 }
 
-
-void MacroAssembler::IndexFromHash(Register hash, Register index) {
-  // If the hash field contains an array index pick it out. 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));
-  DecodeFieldToSmi<String::ArrayIndexValueBits>(index, hash);
-}
-
-
 void MacroAssembler::ObjectToDoubleFPURegister(Register object,
                                                FPURegister result,
                                                Register scratch1,