text: Title: Remove obsolete 'bin/st2-check-license'
  Body: The project ships https://github.com/StackStorm/st2/blob/master/st2common/bin/st2-check-license which is irrelevant now, considering ongoing EWC features integration in the st2 core.
  
  The task is to find all the places: https://github.com/search?q=org%3AStackStorm+st2-check-license&type=code and remove the `st2-check-license` scripts.
  
  This is an easy `good first issue` for someone willing to start contributing and exploring the st2 system.
  Bonus points to find other obsolete, outdated, irrelevant scripts in st2 core.
  Help wanted!