Allow empty single-line bodies in property accessors

idea/testData/quickfix/implement/nestedPrivateInterface.kt.after

@@ -10,7 +10,6 @@ class Container {
     class BaseImpl : Base {
         override var z: Double
             get() = TODO("not implemented") //To change initializer of created properties use File | Settings | File Templates.
-            set(value) {
-            }
+            set(value) {}
     }
 }