Pull Up: Drop 'override' modifier if moved member doesn't override anything

idea/testData/refactoring/pullUp/k2k/dropModifierWhenMovingSideOverrideWithAbstract.kt

@@ -0,0 +1,13 @@
+open class A {
+}
+
+interface I {
+    fun foo()
+}
+
+class <caret>B : A(), I {
+    // INFO: {"checked": "true", "toAbstract": "true"}
+    override fun foo() {
+
+    }
+}