Fix build

[staabm]

remove dead code, which errors since phpstan/phpstan-src#5209

before this PR

------ ----------------------------------------------------------------------- 
  Line   src/Rules/PHPUnit/AnnotationHelper.php                                 
 ------ ----------------------------------------------------------------------- 
  50     Call to function array_key_exists() with 'annotation' and array{0:     
         non-falsy-string, annotation: non-falsy-string, 1: non-falsy-string,   
         property: non-empty-string, 2: non-empty-string, whitespace: string,   
         3: string, value: string, ...} will always evaluate to true.           
         🪪  function.alreadyNarrowedType                                       
  50     Call to function array_key_exists() with 'whitespace' and array{0:     
         non-falsy-string, annotation: non-falsy-string, 1: non-falsy-string,   
         property: non-empty-string, 2: non-empty-string, whitespace: string,   
         3: string, value: string, ...} will always evaluate to true.           
         🪪  function.alreadyNarrowedType                                       
  50     Strict comparison using === between true and false will always         
         evaluate to false.                                                     
         🪪  identical.alwaysFalse                                              
         💡  Because the type is coming from a PHPDoc, you can turn off this    
         check by setting treatPhpDocTypesAsCertain: false in your phpstan.neo  
         n.                                                                     
  50     Strict comparison using === between true and false will always         
         evaluate to false.                                                     
         🪪  identical.alwaysFalse                                              
         💡  Because the type is coming from a PHPDoc, you can turn off this    
         check by setting treatPhpDocTypesAsCertain: false in your phpstan.neo  
         n.                                                                     
 ------ ----------------------------------------------------------------------- 

[ondrejmirtes]

Should I release it alongside 2.1.41 or not necessary?

[ondrejmirtes]

Thank you.

[staabm]

Should I release it alongside 2.1.41 or not necessary?

I think its not necessary