Fix line-length example

[hiker]

Fixes #2520 by removing the kernels directive.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 99.85%. Comparing base (cc01582) to head (496ad4c).

:exclamation: Current head 496ad4c differs from pull request most recent head bbd08d0. Consider uploading reports for the commit bbd08d0 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2521   +/-   ##
=======================================
  Coverage   99.85%   99.85%           
=======================================
  Files         356      356           
  Lines       47831    47831           
=======================================
  Hits        47762    47762           
  Misses         69       69           

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