Merge pull request swiftlang#81173 from slavapestov/unused-vars

Squash warnings

Author: slavapestov

lib/SILOptimizer/Utils/SILIsolationInfo.cpp

@@ -899,7 +899,7 @@ SILIsolationInfo SILIsolationInfo::get(SILArgument *arg) {
   if (auto *isolatedArg = llvm::cast_or_null<SILFunctionArgument>(
           fArg->getFunction()->maybeGetIsolatedArgument())) {
     auto astType = isolatedArg->getType().getASTType();
-    if (auto *nomDecl = astType->lookThroughAllOptionalTypes()->getAnyActor()) {
+    if (astType->lookThroughAllOptionalTypes()->getAnyActor()) {
       return SILIsolationInfo::getActorInstanceIsolated(fArg, isolatedArg);
     }
   }

lib/Sema/TypeCheckEffects.cpp

@@ -1182,8 +1182,6 @@ class Classification {
              PotentialEffectReason reason, SourceLoc loc,
              bool skipTypeCheck,
              std::optional<EffectKind> onlyEffect = std::nullopt) {
-    ASTContext &ctx = declRef.getDecl()->getASTContext();
-
     Classification result;
     bool considerAsync = !onlyEffect || *onlyEffect == EffectKind::Async;
     bool considerThrows = !onlyEffect || *onlyEffect == EffectKind::Throws;