remove pull request template

[Edoardo-Pedicillo]

Closes #708

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.28%. Comparing base (cf75615) to head (b48cf4b).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1058   +/-   ##
=======================================
  Coverage   97.28%   97.28%           
=======================================
  Files         124      124           
  Lines        9893     9893           
=======================================
  Hits         9624     9624           
  Misses        269      269           

Flag	Coverage Δ
unittests	97.28% <ø> (ø)

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see 2 files with indirect coverage changes