Remove protocol resource which is not used by client.

[jkmarx]

Ref #2618

• Protocol Resource currently not used by client since Satori was removed.
  In the future, we may need to add an API to support dashboard enhancements, Ref Dashboard Enhance DS Details #3250

[codecov]

Codecov Report

Merging #3253 into develop will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           develop   #3253   +/-   ##
=======================================
  Coverage     66.9%   66.9%           
=======================================
  Files          384     384           
  Lines        24283   24283           
  Branches       854     854           
=======================================
  Hits         16247   16247           
  Misses        8036    8036

Impacted Files	Coverage Δ
refinery/data_set_manager/api.py	93.33% <100%> (ø)	⬆️

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