Remove comments from function/property implementation template

#KT-18539 Fixed

idea/testData/quickfix/createFromUsage/createFunction/invoke/lambdaArgument.kt.after

@@ -9,5 +9,5 @@ fun test() {
 }
 
 private operator fun Test.invoke(function: () -> Unit) {
-    TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+    TODO("Not yet implemented")
 }