[builtins] Turn StoreIC_Miss and StoreIC_Slow builtins to TurboFan code stubs.

src/ic/s390/handler-compiler-s390.cc

Index: src/ic/s390/handler-compiler-s390.cc
diff --git a/src/ic/s390/handler-compiler-s390.cc b/src/ic/s390/handler-compiler-s390.cc
index 7f78b64703df86b28499226d147f9b3317ab13d8..19110325d3f0723c19fd5d302ff626c15851dce4 100644
--- a/src/ic/s390/handler-compiler-s390.cc
+++ b/src/ic/s390/handler-compiler-s390.cc
@@ -317,14 +317,6 @@ static void StoreIC_PushArgs(MacroAssembler* masm) {
           VectorStoreICDescriptor::VectorRegister());
 }
 
-void NamedStoreHandlerCompiler::GenerateSlow(MacroAssembler* masm) {
-  StoreIC_PushArgs(masm);
-
-  // The slow case calls into the runtime to complete the store without causing
-  // an IC miss that would otherwise cause a transition to the generic stub.
-  __ TailCallRuntime(Runtime::kStoreIC_Slow);
-}
-
 void ElementHandlerCompiler::GenerateStoreSlow(MacroAssembler* masm) {
   StoreIC_PushArgs(masm);