Remove documentation links from admin page

The links for Change-Id and Signed-off-by documentation in the
admin page are hard-coded to specific versions on the the
gerrit-documentation.googlesource.com site.

This causes two problems.  Firstly, they are not links to local
versions, and secondly it is easy to forget to update them and
they become out of date.

Remove the links.  Administrators should be capable of finding
the relevant pages in the documentation by themselves.

Bug: Issue 2127
Change-Id: Idd4ddd1126e0631615d564173a02e3047aa87559
1 file changed