remove unused functions

[apfitzge]

Problem

• functions are unused
• tests rely on actual value of priority
• value of priority changing with Scheduler - prioritization fees/cost #34888, which breaks tests of these fns

Summary of Changes

• remove the unused functions and their tests

Fixes #

[tao-stones]

lgtm

[codecov]

Codecov Report

Attention: 35 lines in your changes are missing coverage. Please review.

Comparison is base (a5c470d) 81.7% compared to head (84a8e23) 81.6%.
Report is 7 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #34895     +/-   ##
=========================================
- Coverage    81.7%    81.6%   -0.2%     
=========================================
  Files         826      827      +1     
  Lines      223413   223801    +388     
=========================================
+ Hits       182614   182653     +39     
- Misses      40799    41148    +349