Remove comments from function/property implementation template

#KT-18539 Fixed

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

@@ -10,6 +10,6 @@ expect interface InterfaceWithFuns {
 
 class ChildOfInterface : InterfaceWithFuns{
     override fun funInInterface() {
-        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+        TODO("Not yet implemented")
     }
 }