Remove now-unused Semaphore and Devbox configs

[jasonroelofs]

Description

Documentation

Does this require changes to the WorkOS Docs? E.g. the API Reference or code snippets need updates.

[ ] Yes

If yes, link a related docs PR and add a docs maintainer as a reviewer. Their approval is required.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.63%. Comparing base (1766853) to head (39d28b5).

❗ Current head 39d28b5 differs from pull request most recent head e0c9c78. Consider uploading reports for the commit e0c9c78 to get more accurate results

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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #277   +/-   ##
=======================================
  Coverage   95.63%   95.63%           
=======================================
  Files          42       42           
  Lines         940      940           
=======================================
  Hits          899      899           
  Misses         41       41           

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