Remove unused variables

These currently warn for being unused

Author: keith

lib/IRGen/GenMeta.cpp

@@ -5101,7 +5101,6 @@ void IRGenModule::emitOpaqueTypeDecl(OpaqueTypeDecl *D) {
 bool irgen::methodRequiresReifiedVTableEntry(IRGenModule &IGM,
                                              const SILVTable *vtable,
                                              SILDeclRef method) {
-  auto &M = IGM.getSILModule();
   auto entry = vtable->getEntry(IGM.getSILModule(), method);
   if (!entry) {
     return true;

lib/IRGen/MetadataRequest.cpp

@@ -2226,8 +2226,6 @@ irgen::emitCanonicalSpecializedGenericTypeMetadataAccessFunction(
   }
   Type superclassType = theType->getSuperclass(/*useArchetypes=*/false);
   if (superclassType) {
-    auto superclass = superclassType->getCanonicalType();
-    auto *superclassNominal = superclass->getAnyNominal();
     emitIdempotentCanonicalSpecializedClassMetadataInitializationComponent(
         IGF, superclassType->getCanonicalType(), initializedTypes);
   }