[intrinsics] Nuke %HasCachedArrayIndex and %GetCachedArrayIndex.

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 c5aba632c7a4efe1c6b19c49a2af86c57439e1c1..566fdf14f2ced34c15d052cbd1941f330c35629b 100644
--- a/src/arm/macro-assembler-arm.cc
+++ b/src/arm/macro-assembler-arm.cc
@@ -2541,18 +2541,6 @@ 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::SmiToDouble(LowDwVfpRegister value, Register smi) {
   if (CpuFeatures::IsSupported(VFPv3)) {
     CpuFeatureScope scope(this, VFPv3);