chore: remove unused nightly workflow from CircleCI config

[NguyenHoangSon96]

Closes #

Proposed Changes

• Removing the "nightly" setting in the ".circleci/config.yml" file to use the trigger nightly build setting from the CircleCI app.

Checklist

• CHANGELOG.md updated
• Rebased/mergeable
• A test has been added if appropriate
• Tests pass
• Commit messages are conventional
• Sign CLA (if not already signed)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 69.79%. Comparing base (5c8d818) to head (afe5c2d).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #169      +/-   ##
==========================================
+ Coverage   69.70%   69.79%   +0.08%     
==========================================
  Files          35       35              
  Lines        2314     2314              
==========================================
+ Hits         1613     1615       +2     
+ Misses        701      699       -2     

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[bednar]

LGTM 🚀