mdoc: Garbage collect unused/unneeded macros

svn path=/head/; revision=208594

lib/msun/man/math.3

@@ -31,9 +31,6 @@
 .Dd December 16, 2007
 .Dt MATH 3
 .Os
-.if n \{\
-.char \[sr] "sqrt
-.\}
 .Sh NAME
 .Nm math
 .Nd "floating-point mathematical library"

share/man/man9/atomic.9

@@ -62,7 +62,6 @@
 .Fn atomic_subtract_[acq_|rel_]<type> "volatile <type> *p" "<type> v"
 .Ft void
 .Fn atomic_store_rel_<type> "volatile <type> *p" "<type> v"
-.rm LB RB La Ra
 .Sh DESCRIPTION
 Each of the atomic operations is guaranteed to be atomic in the presence of
 interrupts.

usr.sbin/nfsd/nfsv4.4

@@ -34,7 +34,7 @@
 The experimental NFS client and server provides support for the
 .Tn NFSv4
 specification; see
-.%T "Network File System (NFS) Version 4 Protocol \\*(tNRFC\\*(sP 3530" .
+.%T "Network File System (NFS) Version 4 Protocol RFC 3530" .
 The protocol is somewhat similar to NFS Version 3, but differs in significant
 ways.
 It uses a single compound RPC that concatenates operations to-gether.

usr.sbin/nfsd/stablerestart.5

@@ -42,7 +42,7 @@ file holds information that allows the
 server to restart without always returning the NFSERR_NOGRACE error, as described in the
 .Tn NFSv4
 server specification; see
-.%T "Network File System (NFS) Version 4 Protocol \\*(tNRFC\\*(sP 3530, Section 8.6.3" .
+.%T "Network File System (NFS) Version 4 Protocol RFC 3530, Section 8.6.3" .
 .Pp
 The first record in the file, as defined by struct nfsf_rec in
 /usr/include/fs/nfs/nfsrvstate.h, holds the lease duration of the