[3.11] Fix duplicate cancelling check in TimerContext due to merge conflict resolution error

[bdraco]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.81%. Comparing base (cfe9c0a) to head (62f840b).
Report is 1 commits behind head on 3.11.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             3.11    #9417      +/-   ##
==========================================
- Coverage   97.81%   97.81%   -0.01%     
==========================================
  Files         108      108              
  Lines       35149    35147       -2     
  Branches     4194     4193       -1     
==========================================
- Hits        34380    34378       -2     
  Misses        573      573              
  Partials      196      196              

Flag	Coverage Δ
CI-GHA	97.69% <ø> (+<0.01%)	⬆️
OS-Linux	97.37% <ø> (+<0.01%)	⬆️
OS-Windows	94.89% <ø> (+<0.01%)	⬆️
OS-macOS	97.08% <ø> (+0.01%)	⬆️
Py-3.10.11	96.93% <ø> (+<0.01%)	⬆️
Py-3.10.15	96.87% <ø> (+<0.01%)	⬆️
Py-3.11.10	96.95% <ø> (+0.01%)	⬆️
Py-3.11.9	97.03% <ø> (+0.01%)	⬆️
Py-3.12.6	97.41% <ø> (+<0.01%)	⬆️
Py-3.13.0-rc.3	97.40% <ø> (+<0.01%)	⬆️
Py-3.9.13	96.84% <ø> (+<0.01%)	⬆️
Py-3.9.20	96.79% <ø> (+<0.01%)	⬆️
Py-pypy7.3.16	96.39% <ø> (+<0.01%)	⬆️
VM-macos	97.08% <ø> (+0.01%)	⬆️
VM-ubuntu	97.37% <ø> (+<0.01%)	⬆️
VM-windows	94.89% <ø> (+<0.01%)	⬆️

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