Fix: Remove phpstan/phpstan

[localheinz]

This pull request

• removes phpstan/phpstan

[codecov]

Codecov Report

Merging #810 (4507690) into main (a2fb821) will increase coverage by 0.52%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main     #810      +/-   ##
============================================
+ Coverage     83.96%   84.48%   +0.52%     
  Complexity       57       57              
============================================
  Files             4        4              
  Lines           237      245       +8     
============================================
+ Hits            199      207       +8     
  Misses           38       38              

Impacted Files	Coverage Δ
src/NormalizePlugin.php	61.53% <0.00%> (ø)
src/Command/NormalizeCommand.php	91.28% <0.00%> (+0.33%)	⬆️

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