Add remove function to the PriorityQueue

[KyrylR]

• Since this PR suggests a bug fix, the tests have been added and the coverage is 100%.
• Since this PR introduces a new feature, the update has been discussed in an Issue or with the team.
• This PR is just a minor change, like a typo fix.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.94%. Comparing base (00a0d1e) to head (adfff5c).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #147   +/-   ##
=======================================
  Coverage   99.93%   99.94%           
=======================================
  Files          47       47           
  Lines        3313     3340   +27     
  Branches      391      395    +4     
=======================================
+ Hits         3311     3338   +27     
  Misses          2        2           

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[Arvolear]

LGTM!