Remove methods that are already in FastDifferentiation

[elaine-ran]

Now that the base methods are included in FastDifferentiation.jl we no longer need to have them in QuaternionicFastDifferentiationExt.jl.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.66%. Comparing base (68b089d) to head (0da7a30).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #60      +/-   ##
==========================================
+ Coverage   94.32%   94.66%   +0.34%     
==========================================
  Files          19       19              
  Lines        1075     1069       -6     
==========================================
- Hits         1014     1012       -2     
+ Misses         61       57       -4     

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