fix!: remove legacy PWA setup command from custom.just

This is not necessary anymore. It's the job of Flatpak authors. All of them have these permissions by default nowadays, including Microsoft Edge.

usr/share/ublue-os/just/custom.just

@@ -7,11 +7,6 @@ setup-flatpaks:
       flatpak install --user --noninteractive flathub $pkg; \
   done
 
-setup-pwa:
-  echo 'Giving browser permission to create PWAs (Progressive Web Apps)'
-  # Add for your favorite chromium-based browser
-  flatpak override --user --filesystem=~/.local/share/applications --filesystem=~/.local/share/icons com.microsoft.Edge
-
 setup-gaming:
   echo 'Setting up gaming experience ... lock and load.'
   flatpak install -y --user \\