gnu: Remove allegro-5.0. [security fixes]

This package has no dependencies in Guix, is unsupported (see
https://liballeg.org/old.html) and is vulnerable to CVE-2021-36489.

* gnu/packages/game-development.scm (allegro-5.0): Delete variable.
* gnu/local.mk: Deregister patch.
* gnu/packages/patches/allegro-mesa-18.2.5-and-later.patch: Delete file.

Signed-off-by: Maxim Cournoyer <maxim.cournoyer@gmail.com>

gnu/local.mk

@@ -957,7 +957,6 @@ dist_patch_DATA =						\
   %D%/packages/patches/akonadi-paths.patch		\
   %D%/packages/patches/akonadi-not-relocatable.patch		\
   %D%/packages/patches/akonadi-timestamps.patch		\
-  %D%/packages/patches/allegro-mesa-18.2.5-and-later.patch	\
   %D%/packages/patches/alure-dumb-2.patch			\
   %D%/packages/patches/ibus-anthy-fix-tests.patch		\
   %D%/packages/patches/ibus-table-paths.patch			\

gnu/packages/game-development.scm

@@ -1132,24 +1132,6 @@ etc.")
     (home-page "https://liballeg.org")
     (license license:bsd-3)))
 
-(define-public allegro-5.0
-  (package (inherit allegro)
-    (name "allegro")
-    (version "5.0.11")
-    (source (origin
-              (method url-fetch)
-              (uri (string-append "https://github.com/liballeg/allegro5/releases"
-                                  "/download/" version "/allegro-"
-                                  (if (equal? "0" (string-take-right version 1))
-                                    (string-drop-right version 2)
-                                    version)
-                                  ".tar.gz"))
-              (patches (search-patches
-                        "allegro-mesa-18.2.5-and-later.patch"))
-              (sha256
-               (base32
-                "0cd51qrh97jrr0xdmnivqgwljpmizg8pixsgvc4blqqlaz4i9zj9"))))))
-
 (define-public aseprite
   (package
     (name "aseprite")

gnu/packages/patches/allegro-mesa-18.2.5-and-later.patch

@@ -1,41 +0,0 @@
-Fixes compilation with Mesa >= 18.2.5.
-
-Taken from upstream:
-
-https://github.com/liballeg/allegro5/commit/a40d30e21802ecf5c9382cf34af9b01bd3781e47
-
-diff --git a/include/allegro5/allegro_opengl.h b/include/allegro5/allegro_opengl.h
-index 0f86a6768..652dd024e 100644
---- a/include/allegro5/allegro_opengl.h
-+++ b/include/allegro5/allegro_opengl.h
-@@ -103,10 +103,14 @@
-
- /* HACK: Prevent both Mesa and SGI's broken headers from screwing us */
- #define __glext_h_
-+#define __gl_glext_h_
- #define __glxext_h_
-+#define __glx_glxext_h_
- #include <GL/gl.h>
- #undef  __glext_h_
-+#undef  __gl_glext_h_
- #undef  __glxext_h_
-+#undef  __glx_glxext_h_
-
- #endif /* ALLEGRO_MACOSX */
-
-diff --git a/include/allegro5/opengl/GLext/glx_ext_defs.h b/include/allegro5/opengl/GLext/glx_ext_defs.h
-index 49c502091..fba8aea5d 100644
---- a/include/allegro5/opengl/GLext/glx_ext_defs.h
-+++ b/include/allegro5/opengl/GLext/glx_ext_defs.h
-@@ -1,7 +1,9 @@
- /* HACK: Prevent both Mesa and SGI's broken headers from screwing us */
- #define __glxext_h_
-+#define __glx_glxext_h_
- #include <GL/glx.h>
- #undef __glxext_h_
-+#undef __glx_glxext_h_
-
- #ifndef GLX_VERSION_1_3
- #define _ALLEGRO_GLX_VERSION_1_3
---
-2.20.0