Title says it all I guess. Did a small lisp program to check for not needed NotImplemented.h includes. Guess you can do it in one line with perl, but well, this is what I know :)
Created attachment 29544 [details] notimplemented.patch Remove superfluous NotImplemented.h includes.
Created attachment 29545 [details] notimplemented.lisp The program used, for reference.
Thank you, landed as r42590.