Remove unused mockito extension

[trask]

Cleans up this warning during tests

WARNING: A terminally deprecated method in sun.misc.Unsafe has been called
WARNING: sun.misc.Unsafe::objectFieldOffset has been called by net.bytebuddy.dynamic.loading.ClassInjector$UsingUnsafe$Dispatcher$CreationAction (file:/C:/Users/trstalna/.gradle/caches/modules-2/files-2.1/net.bytebuddy/byte-buddy/1.17.7/3856bfab61beb23e099a0d6629f2ba8de4b98ace/byte-buddy-1.17.7.jar)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.12%. Comparing base (ded95ea) to head (8846a6d).

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #7690   +/-   ##
=========================================
  Coverage     90.12%   90.12%           
  Complexity     7187     7187           
=========================================
  Files           814      814           
  Lines         21700    21700           
  Branches       2123     2123           
=========================================
  Hits          19557    19557           
  Misses         1477     1477           
  Partials        666      666           

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[trask]

Superseded by #7691