FLEXY-000: Revert "added flex local dev"

[rishigupta-3]

This reverts commit 38aecf9.

Contributing to Twilio

All third-party contributors acknowledge that any contributions they provide will be made under the same open-source license that the open-source project is provided under.

• I acknowledge that all my contributions will be made under the project's license.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.65%. Comparing base (929e197) to head (dd1e633).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1147      +/-   ##
==========================================
- Coverage   89.74%   89.65%   -0.09%     
==========================================
  Files         146      146              
  Lines       14483    14482       -1     
  Branches      984      980       -4     
==========================================
- Hits        12997    12983      -14     
- Misses       1465     1478      +13     
  Partials       21       21              

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