Remove RLock from Requester

[EnricoMi]

Each process is refreshing its own copy of the token individually, with or without lock.

Fixes #2436.
Fixes #2430.

[codecov-commenter]

Codecov Report

Patch coverage: 50.00% and project coverage change: -0.01 ⚠️

Comparison is base (def5223) 98.77% compared to head (15e7096) 98.77%.

📣 This organization is not using Codecov’s GitHub App Integration. We recommend you install it so Codecov can continue to function properly for your repositories. Learn more

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2446      +/-   ##
==========================================
- Coverage   98.77%   98.77%   -0.01%     
==========================================
  Files         117      117              
  Lines       11674    11671       -3     
==========================================
- Hits        11531    11528       -3     
  Misses        143      143              

Impacted Files	Coverage Δ
github/Requester.py	97.41% <50.00%> (-0.03%)	⬇️

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.

[s-t-e-v-e-n-k]

You need the Fixes in the commit body for GitHub to automatically close the issues, once that's done we can merge this.

[EnricoMi]

You need the Fixes in the commit body for GitHub to automatically close the issues, once that's done we can merge this.

The "Fixes" in the pull request description do as well.

[reconman]

The "Fixes" in the pull request description do as well.

Can confirm, Github even says so on the right side of the PR:

[s-t-e-v-e-n-k]

I will admit I've been waiting for @dblanchette to chime in here, but let's move on.