Remove comments from function/property implementation template

#KT-18539 Fixed

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

@@ -12,9 +12,9 @@ expect interface InterfaceWithVals {
 
 class ChildOfInterface : InterfaceWithVals{
     override fun funInInterface() {
-        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+        TODO("Not yet implemented")
     }
 
     override val importantVal: Int
-        get() = TODO("not implemented") //To change initializer of created properties use File | Settings | File Templates.
+        get() = TODO("Not yet implemented")
 }