[clang][CGExprScalar] Remove no-op ptr-to-ptr bitcast (NFC) (#72072)

Remove bitcast added back in dcd7471 .

Author: JOE1994

clang/lib/CodeGen/CGExprScalar.cpp

@@ -2224,18 +2224,8 @@ Value *ScalarExprEmitter::VisitCastExpr(CastExpr *CE) {
     return Visit(const_cast<Expr*>(E));
 
   case CK_NoOp: {
-    llvm::Value *V = CE->changesVolatileQualification()
-                         ? EmitLoadOfLValue(CE)
-                         : Visit(const_cast<Expr *>(E));
-    if (V) {
-      // CK_NoOp can model a pointer qualification conversion, which can remove
-      // an array bound and change the IR type.
-      // FIXME: Once pointee types are removed from IR, remove this.
-      llvm::Type *T = ConvertType(DestTy);
-      if (T != V->getType())
-        V = Builder.CreateBitCast(V, T);
-    }
-    return V;
+    return CE->changesVolatileQualification() ? EmitLoadOfLValue(CE)
+                                              : Visit(const_cast<Expr *>(E));
   }
 
   case CK_BaseToDerived: {