Remove comments from function/property implementation template

#KT-18539 Fixed

idea/testData/quickfix/createFromUsage/createFunction/set/createSetFromUsage2.kt.after

@@ -10,5 +10,5 @@ class Foo<T> {
 }
 
 private operator fun <T> Any.set(s: String, w: ArrayList<T>, value: ArrayList<T>) {
-    TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+    TODO("Not yet implemented")
 }