ecwolf: remove obsolete build steps

ECWolf 1.4.0 made several changes that make it easier for Linux distros
to create packages for ECWolf [1]. ECWolf now generates its own desktop
shortcut, so we no longer need to use makeDesktopItem. ECWolf now also
will look in the CMAKE_INSTALL_PREFIX/share/ecwolf directory for
ecwolf.pk3, so we no longer need to patch src/version.h or copy
ecwolf.pk3 manually.

[1]: 55a28ec7e1

pkgs/games/ecwolf/default.nix

@@ -28,38 +28,11 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake copyDesktopItems pkg-config ];
   buildInputs = [ zlib bzip2 libjpeg SDL2 SDL2_net SDL2_mixer gtk3 ];
 
-  desktopItems = [
-    (makeDesktopItem {
-      name = "ecwolf";
-      exec = "ecwolf";
-      comment = "Enhanced Wolfenstein 3D port";
-      desktopName = "Wolfenstein 3D";
-      categories = [ "Game" ];
-    })
-  ];
-
-  # Change the location where the ecwolf executable looks for the ecwolf.pk3
-  # file.
-  #
-  # By default, it expects the PK3 file to reside in the same directory as the
-  # executable, which is not desirable.
-  # We will adjust the code so that it can be retrieved from the share/
-  # directory.
-
-  preConfigure = ''
-    sed -i -e "s|ecwolf.pk3|$out/share/ecwolf/ecwolf.pk3|" src/version.h
-  ''
   # Disable app bundle creation on Darwin. It fails, and it is not needed to run it from the Nix store
-  + lib.optionalString stdenv.isDarwin ''
+  preConfigure = lib.optionalString stdenv.isDarwin ''
     sed -i -e "s|include(\''${CMAKE_CURRENT_SOURCE_DIR}/macosx/install.txt)||" src/CMakeLists.txt
   '';
 
-  # Install the required PK3 file in the required data directory
-  postInstall = ''
-    mkdir -p $out/share/ecwolf
-    cp ecwolf.pk3 $out/share/ecwolf
-  '';
-
   meta = with lib; {
     description = "Enhanched SDL-based port of Wolfenstein 3D for various platforms";
     homepage = "https://maniacsvault.net/ecwolf/";