Remove comments from function/property implementation template

#KT-18539 Fixed

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

@@ -17,10 +17,10 @@ class Container {
 
 class BaseImpl : Container.Base {
     override val x: Boolean
-        get() = TODO("not implemented") //To change initializer of created properties use File | Settings | File Templates.
+        get() = TODO("Not yet implemented")
 
     override fun bar(z: Int): String {
-        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+        TODO("Not yet implemented")
     }
 }