Tweak an out-of-date option name.
Tweak an out-of-date option name.

* notes/changelist-design.txt
  s/--clear/--remove/

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion