feat(legacy): remove db allowed_cors_origins preference

[jooola]

• Remove after deprecation in eb8e7b3

[codecov]

Codecov Report

Merging #2095 (f415a1f) into main (e54c8d2) will decrease coverage by 1.08%.
The diff coverage is 100.00%.

❗ Current head f415a1f differs from pull request most recent head 1d0148f. Consider uploading reports for the commit 1d0148f to get more accurate results

@@            Coverage Diff             @@
##             main    #2095      +/-   ##
==========================================
- Coverage   60.75%   59.67%   -1.09%     
==========================================
  Files         180      187       +7     
  Lines        4355     4692     +337     
==========================================
+ Hits         2646     2800     +154     
- Misses       1709     1892     +183     

Flag	Coverage Δ
api	94.30% <100.00%> (+0.36%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...i/legacy/migrations/0040_remove_cors_preference.py	100.00% <100.00%> (ø)
api/libretime_api/legacy/migrations/_version.py	93.75% <0.00%> (-0.99%)	⬇️
shared/libretime_shared/config/_models.py	95.68% <0.00%> (-0.37%)	⬇️
shared/libretime_shared/datetime.py	100.00% <0.00%> (ø)
playout/libretime_playout/recorder.py	0.00% <0.00%> (ø)
playout/libretime_playout/player/file.py	0.00% <0.00%> (ø)
playout/libretime_playout/player/push.py	0.00% <0.00%> (ø)
playout/libretime_playout/player/fetch.py	0.00% <0.00%> (ø)
playout/libretime_playout/player/queue.py	0.00% <0.00%> (ø)
playout/libretime_playout/message_handler.py	0.00% <0.00%> (ø)
... and 23 more

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