Internals: No need for variable name on immediate visitors. No functional change intended.

src/V3Cast.cpp

@@ -203,6 +203,6 @@ public:
 
 void V3Cast::castAll(AstNetlist* nodep) {
     UINFO(2, __FUNCTION__ << ": " << endl);
-    { const CastVisitor visitor{nodep}; }  // Destruct before checking
+    { CastVisitor{nodep}; }  // Destruct before checking
     V3Global::dumpCheckGlobalTree("cast", 0, v3Global.opt.dumpTreeLevel(__FILE__) >= 3);
 }