[intrinsics] Nuke %HasCachedArrayIndex and %GetCachedArrayIndex.

src/s390/macro-assembler-s390.cc

Index: src/s390/macro-assembler-s390.cc
diff --git a/src/s390/macro-assembler-s390.cc b/src/s390/macro-assembler-s390.cc
index 6cbe66cf218934543dc78fe7cca3f65d0fda0b5c..31409bdd7965414a5a6de9c6f0b109599f7f26e2 100644
--- a/src/s390/macro-assembler-s390.cc
+++ b/src/s390/macro-assembler-s390.cc
@@ -2211,16 +2211,6 @@ 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::TestDoubleIsInt32(DoubleRegister double_input,
                                        Register scratch1, Register scratch2,
                                        DoubleRegister double_scratch) {