Removing the reference to the 'commands' permission as it is no longer needed.

BUG=153178
TEST=The docs should no longer show the 'commands' permission as being a pre-requisite.
Review URL: https://chromiumcodereview.appspot.com/11093072

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@161341 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed