Package check result: NOTE

Check: CRAN incoming feasibility, Result: NOTE
  Maintainer: ‘Andy Bunn <bunna@wwu.edu>’
  
  Found the following (possibly) invalid URLs:
    URL: https://www.mathworks.com/matlabcentral/
      From: man/skel.plot.Rd
      Status: 403
      Message: Forbidden

No changes to worse in reverse depends.