[Clang][Sema] Fix warnings after #84050 (#90104)

Author: sdkrystian

clang/lib/Sema/SemaExprMember.cpp

@@ -1793,7 +1793,6 @@ ExprResult Sema::ActOnMemberAccessExpr(Scope *S, Expr *Base,
   DecomposeUnqualifiedId(Id, TemplateArgsBuffer,
                          NameInfo, TemplateArgs);
 
-  DeclarationName Name = NameInfo.getName();
   bool IsArrow = (OpKind == tok::arrow);
 
   if (getLangOpts().HLSL && IsArrow)

clang/lib/Sema/SemaLookup.cpp

@@ -2791,7 +2791,7 @@ bool Sema::LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS,
       return LookupInSuper(R, NNS->getAsRecordDecl());
     // This nested-name-specifier occurs after another nested-name-specifier,
     // so long into the context associated with the prior nested-name-specifier.
-    if (DC = computeDeclContext(*SS, EnteringContext)) {
+    if ((DC = computeDeclContext(*SS, EnteringContext))) {
       // The declaration context must be complete.
       if (!DC->isDependentContext() && RequireCompleteDeclContext(*SS, DC))
         return false;