Java: Don't cast the argument to generic type because we already know that the actual type is assignable to it (IDEA-171284)

java/java-tests/testData/refactoring/extractMethod/AvoidGenericArgumentCastLocalClass.java

@@ -0,0 +1,13 @@
+class C {
+    <K> void method() {
+        class Local {
+            void foo(K k) {
+                <selection>System.out.println(k);</selection>
+            }
+            void bar() {
+                Object o = new Object();
+                System.out.println(o);
+            }
+        }
+    }
+}