Remove EpicsCAOptions class

[GDYendell]

This is unused since #227

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.31%. Comparing base (7582add) to head (92fb66f).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #264      +/-   ##
==========================================
- Coverage   89.34%   89.31%   -0.04%     
==========================================
  Files          46       45       -1     
  Lines        2272     2265       -7     
==========================================
- Hits         2030     2023       -7     
  Misses        242      242              

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