Remove ListValues

[erikbosch]

No plan to implement it and with current response not that useful, as you do not know which values you got back. Remove it for now, add it later if needed

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 54.99%. Comparing base (0ec662b) to head (997e8af).
Report is 1 commits behind head on feature/databroker-api-v2.

Additional details and impacted files

@@                      Coverage Diff                      @@
##           feature/databroker-api-v2      #82      +/-   ##
=============================================================
- Coverage                      55.01%   54.99%   -0.03%     
=============================================================
  Files                             33       33              
  Lines                          14528    14525       -3     
=============================================================
- Hits                            7993     7988       -5     
- Misses                          6535     6537       +2     

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