Removed docs on Loggers in this repo (see Extensions)

[TomHAnderson]

Fixes #673

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.93%. Comparing base (3a38bf9) to head (523afe0).

Additional details and impacted files

@@            Coverage Diff            @@
##              3.1.x     #674   +/-   ##
=========================================
  Coverage     80.93%   80.93%           
  Complexity      495      495           
=========================================
  Files            73       73           
  Lines          1631     1631           
=========================================
  Hits           1320     1320           
  Misses          311      311           

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