extract functional: don't show error dialogs (IDEA-174180)

unable to perform in complex cases instead

java/java-tests/testData/refactoring/introduceFunctionalVariable/beforeIgnoreMethodObjectSuggestion.java

@@ -0,0 +1,8 @@
+class Test {
+    {
+        int x = 0, y;
+        <selection>y = ++x;</selection>
+        System.out.println("x = " + x);
+        System.out.println("y = " + y);
+    }
+}