AppImage: drop bundled WebKitGTK

The update dialog no longer uses wx.html2.WebView on Linux, so nothing in the AppImage loads libwebkit2gtk-4.0-37 anymore and it can be dropped from the bundle.

Author: tadeasf

dist_assets/linux/AppImageBuilder.yml

@@ -30,7 +30,6 @@ AppDir:
       # wx dependencies
       - libgtk-3-0
       - librsvg2-common  # GTK3 recommendation; without it, search in char editor crashes
-      - libwebkit2gtk-4.0-37  # Needed for wx's HTML lib
       # Unknown
       - libpcre2-32-0  # https://github.com/pyfa-org/Pyfa/issues/2572
       - libnotify4  # https://github.com/pyfa-org/Pyfa/issues/2598