X87: [runtime] Drop redundant %CharFromCode runtime entry.

src/crankshaft/x87/lithium-codegen-x87.cc

Index: src/crankshaft/x87/lithium-codegen-x87.cc
diff --git a/src/crankshaft/x87/lithium-codegen-x87.cc b/src/crankshaft/x87/lithium-codegen-x87.cc
index f8304a63216af64ccd650abad2acbbf32896d149..074628b5ef84c048506283b607cb1030aa73f8cc 100644
--- a/src/crankshaft/x87/lithium-codegen-x87.cc
+++ b/src/crankshaft/x87/lithium-codegen-x87.cc
@@ -4855,7 +4855,8 @@ void LCodeGen::DoDeferredStringCharFromCode(LStringCharFromCode* instr) {
   PushSafepointRegistersScope scope(this);
   __ SmiTag(char_code);
   __ push(char_code);
-  CallRuntimeFromDeferred(Runtime::kCharFromCode, 1, instr, instr->context());
+  CallRuntimeFromDeferred(Runtime::kStringCharFromCode, 1, instr,
+                          instr->context());
   __ StoreToSafepointRegisterSlot(result, eax);
 }