Remove unused file

[DominicOram]

Fixes #1115

Instructions to reviewer on how to test:

1. Confirm file doesn't look to be used anywhere
2. Confirm tests pass

Checks for reviewer

• Would the PR title make sense to a scientist on a set of release notes
• If a new device has been added does it follow the standards
• If changing the API for a pre-existing device, ensure that any beamlines using this device have updated their Bluesky plans accordingly
• Have the connection tests for the relevant beamline(s) been run via dodal connect ${BEAMLINE}

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.75%. Comparing base (63c65a7) to head (3d8b4c3).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1116   +/-   ##
=======================================
  Coverage   97.75%   97.75%           
=======================================
  Files         170      170           
  Lines        6849     6849           
=======================================
  Hits         6695     6695           
  Misses        154      154           

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[DominicOram]

Linting failure fixed in #1118