fix: remove unused import of MagicMock in test_influxdb_client_3.py

[bednar]

Proposed Changes

Fixed failing CI:

Checklist

• 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 69.73%. Comparing base (fb7b3f9) to head (5e365f1).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #178   +/-   ##
=======================================
  Coverage   69.73%   69.73%           
=======================================
  Files          35       35           
  Lines        2333     2333           
=======================================
  Hits         1627     1627           
  Misses        706      706           

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[jansimonb]

LGTM, thanks! 👍