get rid of dir.h

get rid of dir.h

SCCS-vsn: sys/vax/uba/tmscp.c 7.9
SCCS-vsn: sys/vax/uba/ts.c 7.8
SCCS-vsn: sys/vax/uba/qd.c 1.14
SCCS-vsn: sys/vax/uba/vs.c 7.5
SCCS-vsn: sys/vax/uba/qv.c 1.12
SCCS-vsn: sys/vax/uba/ad.c 7.6
SCCS-vsn: sys/vax/uba/ct.c 7.4
SCCS-vsn: sys/vax/uba/dh.c 7.10
SCCS-vsn: sys/vax/uba/dhu.c 7.9
SCCS-vsn: sys/vax/uba/dmf.c 7.10
SCCS-vsn: sys/vax/uba/dmx.c 1.4
SCCS-vsn: sys/vax/uba/dmz.c 7.7
SCCS-vsn: sys/vax/uba/dn.c 7.5
SCCS-vsn: sys/vax/uba/dz.c 7.6
SCCS-vsn: sys/vax/uba/idc.c 7.9
SCCS-vsn: sys/vax/uba/ik.c 7.5
SCCS-vsn: sys/vax/uba/lp.c 7.5
SCCS-vsn: sys/vax/uba/lpa.c 7.3
SCCS-vsn: sys/vax/uba/np.c 7.5
SCCS-vsn: sys/vax/uba/ps.c 7.4
SCCS-vsn: sys/vax/uba/qd_data.c 1.3
SCCS-vsn: sys/vax/uba/rk.c 7.8
SCCS-vsn: sys/vax/uba/rl.c 7.9
SCCS-vsn: sys/vax/uba/tm.c 7.8
SCCS-vsn: sys/vax/uba/uba.c 7.8
SCCS-vsn: sys/vax/uba/uda.c 7.26
SCCS-vsn: sys/vax/uba/up.c 7.9
SCCS-vsn: sys/vax/uba/ut.c 7.6
SCCS-vsn: sys/vax/uba/va.c 7.3
SCCS-vsn: sys/vax/uba/vp.c 7.3