chore: remove pr template

[graykode]

Just remove pr template

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (main@d1ee242). Click here to learn what that means.
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #19   +/-   ##
=======================================
  Coverage        ?   99.23%           
=======================================
  Files           ?        9           
  Lines           ?      521           
  Branches        ?       93           
=======================================
  Hits            ?      517           
  Misses          ?        3           
  Partials        ?        1           

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[github-actions]

Test with 28bd9f1.

• EHET : Empty heap with empty segment tree
• EHDT : Empty heap with dirty segment tree
• FHET : Filled heap with empty segment tree
• FHFT : Filled heap with filled segment tree
  No longer impact gas costs