S390: Turn LoadIndexedInterceptor into a Turbofan stub

Port 9536c388

R=verwaest@chromium.org, joransiu@ca.ibm.com, mbrandy@us.ibm.com, michael_dawson@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1824133002

Cr-Commit-Position: refs/heads/master@{#35006}

src/s390/code-stubs-s390.cc

@@ -1537,28 +1537,6 @@ void LoadIndexedStringStub::Generate(MacroAssembler* masm) {
       masm, PropertyAccessCompiler::MissBuiltin(Code::KEYED_LOAD_IC));
 }
 
-void LoadIndexedInterceptorStub::Generate(MacroAssembler* masm) {
-  // Return address is in lr.
-  Label slow;
-
-  Register receiver = LoadDescriptor::ReceiverRegister();
-  Register key = LoadDescriptor::NameRegister();
-
-  // Check that the key is an array index, that is Uint32.
-  __ TestIfPositiveSmi(key, r0);
-  __ bne(&slow);
-
-  // Everything is fine, call runtime.
-  __ Push(receiver, key);  // Receiver, key.
-
-  // Perform tail call to the entry.
-  __ TailCallRuntime(Runtime::kLoadElementWithInterceptor);
-
-  __ bind(&slow);
-  PropertyAccessCompiler::TailCallBuiltin(
-      masm, PropertyAccessCompiler::MissBuiltin(Code::KEYED_LOAD_IC));
-}
-
 void RegExpExecStub::Generate(MacroAssembler* masm) {
 // Just jump directly to runtime if native RegExp is not selected at compile
 // time or if regexp entry in generated code is turned off runtime switch or