Remove duplicated mock tests from when we needed v3 and v4 differences

[tsmith023]

These exact tests already exist in mock_tests/test_auth.py

[orca-security-eu]

Orca Security Scan Summary

Status	Check	Issues by priority
Passed	Infrastructure as Code	0   0   0   0	View in Orca
Passed	SAST	0   0   0   0	View in Orca
Passed	Secrets	0   0   0   0	View in Orca
Passed	Vulnerabilities	0   0   0   0	View in Orca

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.12%. Comparing base (3ab1e58) to head (4feef5b).
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1651      +/-   ##
==========================================
+ Coverage   88.09%   88.12%   +0.03%     
==========================================
  Files         254      254              
  Lines       17630    17604      -26     
==========================================
- Hits        15531    15514      -17     
+ Misses       2099     2090       -9     

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