workspace: remove obsolete code that handled "workspace" restoration from Komodo 6

(integrated from komodo (trunk) change 83467 by toddw)

git-svn-id: http://svn.openkomodo.com/repos/openkomodo/trunk@14136 b87d16e7-d29f-4ee1-b5ec-817d645d335f
workspace: update to use the pref name constant (NFC)

(integrated from komodo (trunk) change 83468 by toddw)

git-svn-id: http://svn.openkomodo.com/repos/openkomodo/trunk@14137 b87d16e7-d29f-4ee1-b5ec-817d645d335f