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they become out of date.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
diff --git a/gerrit-gwtui/src/main/java/com/google/gerrit/client/admin/AdminConstants.properties b/gerrit-gwtui/src/main/java/com/google/gerrit/client/admin/AdminConstants.properties
index 1637919..bf73847 100644
--- a/gerrit-gwtui/src/main/java/com/google/gerrit/client/admin/AdminConstants.properties
+++ b/gerrit-gwtui/src/main/java/com/google/gerrit/client/admin/AdminConstants.properties
@@ -22,8 +22,8 @@
 projectRepoBrowser = Repository Browser
 useContentMerge = Automatically resolve conflicts
 useContributorAgreements = Require a valid contributor agreement to upload
-useSignedOffBy = Require <a href="http://gerrit-documentation.googlecode.com/svn/Documentation/2.5/user-signedoffby.html#Signed-off-by" target="_blank"><code>Signed-off-by</code></a> in commit message
-requireChangeID = Require <a href="http://gerrit-documentation.googlecode.com/svn/Documentation/2.5/user-changeid.html" target="_blank"><code>Change-Id</code></a> in commit message
+useSignedOffBy = Require <code>Signed-off-by</code> in commit message
+requireChangeID = Require <code>Change-Id</code> in commit message
 headingGroupOptions = Group Options
 isVisibleToAll = Make group visible to all registered users.
 buttonSaveGroupOptions = Save Group Options