Xmoto: remove obsolete patch

pkgs/games/xmoto/default.nix

@@ -15,9 +15,7 @@ rec {
   configureFlags = [];
 
   /* doConfigure should be removed if not needed */
-  phaseNames = [ "doPatch" "doConfigure" "doMakeInstall"];
-
-  patches = [ ./r3402.patch ];
+  phaseNames = [ "doConfigure" "doMakeInstall"];
 
   meta = {
     description = "X-Moto - obstacled race game";

pkgs/games/xmoto/r3402.patch

@@ -1,26 +0,0 @@
-Index: a/src/image/tim_png.cpp
-===================================================================
---- a/src/image/tim_png.cpp	(revision 3401)
-+++ b/src/image/tim_png.cpp	(revision 3402)
-@@ -25,7 +25,8 @@
- #include <stdio.h>
- #include <string.h>
- #include "tim.h"
--#include "png.h"
-+#include <png.h>
-+#include <zlib.h>
- 
- /*==============================================================================
- Types
-Index: ChangeLog
-===================================================================
---- a/ChangeLog	(revision 3401)
-+++ b/ChangeLog	(revision 3402)
-@@ -1,3 +1,7 @@
-+X-Moto 0.5.10 2012-
-+--------------------------------
-+ * libpng patch by Kelly Anderson
-+
- X-Moto 0.5.9 2011-11-13
- --------------------------------
-  * fix a compilation error with libxml