Fix suggestions and bugs spotted by zlin

https://galileo.mailstation.de/gerrit/#/c/5864/

packages/games-engines/renpy/renpy.exlib

@@ -5,7 +5,7 @@ require alternatives
 require setup-py [ import=distutils multibuild=false blacklist=3 ]
 require gtk-icon-cache
 
-export_exlib_phases src_prepare src_install pkg_postinst
+export_exlib_phases src_prepare src_install
 
 SUMMARY="Visual novel engine written in python"
 DESCRIPTION="
@@ -104,7 +104,3 @@ EOF
     done
 }
 
-renpy_pkg_postinst() {
-    alternatives_pkg_postinst
-}
-