Remove some unused variables

Author: slavapestov

lib/ClangImporter/ImportDecl.cpp

@@ -8696,7 +8696,6 @@ static void finishTypeWitnesses(
     NormalProtocolConformance *conformance) {
   auto *dc = conformance->getDeclContext();
   auto nominal = dc->getSelfNominalTypeDecl();
-  auto *module = dc->getParentModule();
 
   auto *proto = conformance->getProtocol();
   auto selfType = conformance->getType();

lib/IDE/ConformingMethodList.cpp

@@ -155,8 +155,6 @@ void ConformingMethodListCallbacks::getMatchingMethods(
   assert(T->mayHaveMembers() && !T->is<ModuleType>());
 
   class LocalConsumer : public VisibleDeclConsumer {
-    ModuleDecl *CurModule;
-
     /// The type of the parsed expression.
     Type T;
 
@@ -204,8 +202,7 @@ void ConformingMethodListCallbacks::getMatchingMethods(
     LocalConsumer(DeclContext *DC, Type T,
                   llvm::SmallPtrSetImpl<ProtocolDecl*> &expectedTypes,
                   SmallVectorImpl<ValueDecl *> &result)
-        : CurModule(DC->getParentModule()), T(T), ExpectedTypes(expectedTypes),
-          Result(result) {}
+        : T(T), ExpectedTypes(expectedTypes), Result(result) {}
 
     void foundDecl(ValueDecl *VD, DeclVisibilityKind reason,
                    DynamicLookupInfo) override {

lib/IRGen/GenMeta.cpp

@@ -2689,7 +2689,6 @@ namespace {
             substitutions.lookupConformance(underlyingDependentType, P);
 
         if (underlyingType->hasTypeParameter()) {
-          auto sig = genericEnv->getGenericSignature();
           underlyingConformance = underlyingConformance.subst(
               underlyingType, QueryInterfaceTypeSubstitutions(genericEnv),
               LookUpConformanceInModule());
@@ -5424,7 +5423,6 @@ IRGenFunction::emitValueWitnessTableRefForMetadata(llvm::Value *metadata) {
       *this, metadata, &addrOfWitnessTablePtr, -1, IGM.WitnessTablePtrTy,
       ".valueWitnesses");
 
-  const auto &ptrAuthOpts = IGM.getOptions().PointerAuth;
   if (auto schema = IGM.getOptions().PointerAuth.ValueWitnessTable) {
     llvm::Value *signedWitnessTablePtr = loadOfWitnessTablePtr;
     llvm::Value *witnessTablePtr = emitPointerAuthAuth(

lib/SILOptimizer/Utils/DistributedActor.cpp

@@ -34,7 +34,6 @@ void emitDistributedActorSystemWitnessCall(
   ProtocolDecl *DAS = C.getDistributedActorSystemDecl();
   assert(DAS);
   auto systemASTType = base->getType().getASTType();
-  auto *module = M.getSwiftModule();
   ProtocolConformanceRef systemConfRef;
 
   // If the base is an existential open it.

lib/Sema/AssociatedTypeInference.cpp

@@ -149,7 +149,6 @@ checkTypeWitness(Type type, AssociatedTypeDecl *assocType,
     return CheckTypeWitnessResult::forSuccess();
 
   const auto proto = Conf->getProtocol();
-  const auto dc = Conf->getDeclContext();
   const auto sig = proto->getGenericSignature();
 
   // FIXME: The RequirementMachine will assert on re-entrant construction.