Remove needless <sys/disklabel.h> and <sys/diskslice.h> #includes.
Remove needless <sys/disklabel.h> and <sys/diskslice.h> #includes.

Sponsored by:	DARPA & NAI Labs.

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