[scripts] Remove the scheduler script

It's not used anymore.

Part of #567
1 job for remove_unused_scripts in 2 minutes and 27 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
failed #208712
docker-build
build_linux_36

00:02:27

 
Name Stage Failure
failed
build_linux_36 Build
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "/scratch/builds/iJyPBhV4/0/beat/beat.web/beat/web/backend/api_urls.py", line 30, in <module>
from . import api
File "/scratch/builds/iJyPBhV4/0/beat/beat.web/beat/web/backend/api.py", line 36, in <module>
from . import local_scheduler
File "/scratch/builds/iJyPBhV4/0/beat/beat.web/beat/web/backend/local_scheduler.py", line 38, in <module>
from ..scripts import scheduler
ModuleNotFoundError: No module named 'beat.web.scripts'
ERROR: Job failed: exit status 1