[CIR][NFC] Fix an unused variable warning (#150758)

This fixes a warning where a variable assigned in 'if' statement wasn't
referenced again.

Author: AmrDeveloper

clang/lib/CIR/CodeGen/CIRGenExprAggregate.cpp

@@ -438,8 +438,7 @@ void AggExprEmitter::visitCXXParenListOrInitListExpr(
     // Push a destructor if necessary.
     // FIXME: if we have an array of structures, all explicitly
     // initialized, we can end up pushing a linear number of cleanups.
-    if (QualType::DestructionKind dtorKind =
-            field->getType().isDestructedType()) {
+    if (field->getType().isDestructedType()) {
       cgf.cgm.errorNYI(e->getSourceRange(),
                        "visitCXXParenListOrInitListExpr destructor");
       return;