remove block_min_prioritization_fee metrics reporting

[tao-stones]

Problem

block_min_prioritization_fee is obsoleted, most usful information about block prioritization fee are available in block_prioritization_fee datapoints.

Summary of Changes

• remove block_min_prioritization_fee datapoint

Fixes #

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.2%. Comparing base (d429f6e) to head (4e7d12c).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6973   +/-   ##
=======================================
  Coverage    83.2%    83.2%           
=======================================
  Files         856      856           
  Lines      376421   376407   -14     
=======================================
+ Hits       313240   313258   +18     
+ Misses      63181    63149   -32     

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