SAK-25326 Remove linktool from trunk base pom <modules> section.

git-svn-id: https://source.sakaiproject.org/svn/sakai/trunk@130926 66ffb92e-73f9-0310-93c1-f5514f145a0a
SAK-25326 remove linktool from trunk .externals

git-svn-id: https://source.sakaiproject.org/svn/sakai/trunk@130927 66ffb92e-73f9-0310-93c1-f5514f145a0a