Remove duplicate dependency from documentation.
Remove duplicate dependency from documentation.

Reviewers: #core_team, schroederc

Reviewed By: #core_team, schroederc

Differential Revision: https://phabricator-dot-kythe-repo.appspot.com/D898

bowlofstew/kythe,kythe/kythe,legrosbuffle/kythe,kythe/kythe,benjyw/kythe,kythe/kythe,bzz/kythe,bowlofstew/kythe,bzz/kythe,legrosbuffle/kythe,benjyw/kythe,bzz/kythe,legrosbuffle/kythe,bowlofstew/kythe,benjyw/kythe,kythe/kythe,legrosbuffle/kythe,benjyw/kythe,benjyw/kythe,legrosbuffle/kythe,legrosbuffle/kythe,kythe/kythe,bzz/kythe,bowlofstew/kythe,kythe/kythe,benjyw/kythe,benjyw/kythe,bzz/kythe,bzz/kythe,bzz/kythe,bowlofstew/kythe,benjyw/kythe,kythe/kythe,kythe/kythe,benjyw/kythe,bowlofstew/kythe,bzz/kythe,legrosbuffle/kythe,benjyw/kythe,bowlofstew/kythe,benjyw/kythe,bzz/kythe,legrosbuffle/kythe,bzz/kythe,bowlofstew/kythe,benjyw/kythe,legrosbuffle/kythe,bzz/kythe,legrosbuffle/kythe,bowlofstew/kythe,bowlofstew/kythe,kythe/kythe,bzz/kythe,kythe/kythe,legrosbuffle/kythe,bowlofstew/kythe,kythe/kythe