[zanata/zanata-server] cbc920: Remove unused dependency

[GitHub]

  Branch: refs/heads/ZNTA-1223
  Home:   https://github.com/zanata/zanata-server
  Commit: cbc9206d175b082ef17bf143917dff91921f096d
      https://github.com/zanata/zanata-server/commit/cbc9206d175b082ef17bf143917dff91921f096d
  Author: Alex Eng <aeng at redhat.com>
  Date:   2016-07-27 (Wed, 27 Jul 2016)

  Changed paths:
    M zanata-frontend/src/editor/gulpfile.js
    M zanata-frontend/src/editor/npm-shrinkwrap.json
    M zanata-frontend/src/editor/package.json

  Log Message:
  -----------
  Remove unused dependency