Remove comments from function/property implementation template

#KT-18539 Fixed

idea/testData/quickfix/createFromUsage/createFunction/set/createSetFromUsage1.kt.after

@@ -6,6 +6,6 @@ class Foo<T> {
     }
 
     private operator fun set(s: String, w: T, value: T) {
-        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+        TODO("Not yet implemented")
     }
 }