SimpleAutoFocus: Remove unimplemented devices

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@14654 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd
Revert "SimpleAutoFocus: Remove unimplemented devices"

Turns out the FocusMonitor _is_ actually doing something, in an
outrageously hackish way....

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@14655 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd