Merge pull request #150 from beeware/deprecate-pyside6-appimage

Deprecate PySide6 AppImage testing.

.github/workflows/app-build-verify.yml

@@ -378,7 +378,9 @@ jobs:
       # push) is fundamentally incompatible with using an old base image. As of today,
       # it's impossible to install Toga on *any* manylinux image (
       # https://gitlab.gnome.org/GNOME/pygobject/-/issues/590); PySide2 can't be
-      # installed on any *supported* manylinux image, and PySide6 only works on 2_28.
+      # installed on any *supported* manylinux image; PySide6 only publishes 2_28 wheels,
+      # but even then, it segfaults when the AppImage starts.
+      #
       # Even when the install *does* work, there are so many incompatibility and
       # binary dependency issues that it's just not worth the oxygen to keep this thing
       # alive.

.github/workflows/ci.yml

@@ -360,7 +360,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        framework: [ toga, pyside6, pygame, console ]
+        # 2024-07-11 (beeware/briefcase#1908): pyside6 segfaults on AppImage start.
+        framework: [ toga, pygame, console ]
 
   test-verify-apps-flatpak-templates:
     name: Verify Flatpak