fix(ci): remove EXTRA_PLATFORM_PLUGINS for wayland

libqwayland-generic.so does not exist in Qt 6.10.3 — the Wayland
client platform plugin was merged into qtbase. linuxdeploy fails
trying to bundle a non-existent file.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: nullmastermind

.github/workflows/build.yml

@@ -102,7 +102,6 @@ jobs:
         if: runner.os == 'Linux'
         run: |
           echo "DISTRIBUTION=AppImage" >> "$GITHUB_ENV"
-          echo "EXTRA_PLATFORM_PLUGINS=libqwayland-generic.so" >> "$GITHUB_ENV"
           sudo apt-get install libxkbcommon-dev libxkbcommon-x11-0 fuse libxcb-cursor-dev libcups2-dev
 
       - name: Configure