Removed some garbage comments: - references to removed math emulators for NPX_DEBUG - header for the null set of mandatory devices - reference to the removed (and bogus when it existed) sysctl   kern.timecounter.method.
Removed some garbage comments:
- references to removed math emulators for NPX_DEBUG
- header for the null set of mandatory devices
- reference to the removed (and bogus when it existed) sysctl
  kern.timecounter.method.

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase