pxt staticpkg bundles unused webapps (kiosk.html, multiplayer.html) into non-arcade targets

When running pxt staticpkg on non-arcade targets (like pxt-ev3), the build output still includes unnecessary entrypoints:

  • kiosk.html

  • multiplayer.html

These files are specific to MakeCode Arcade or classroom setups and are not needed for hardware/robotics targets. They create extra build bloat and leave non-working public URLs.

Right now, we have to manually delete them with post-build cleanup scripts (rm -f built/packaged/kiosk*).

Could pxt staticpkg automatically skip copying these arcade-specific pages for targets that don’t use them, or provide a config flag to opt out?