Remove the dependency on procfs.

Reviewed by:	kib
MFC after:	1 week
X-MFC with:	r257430

usr.bin/limits/limits.1

@@ -19,7 +19,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd January 23, 2012
+.Dd October 31, 2013
 .Dt LIMITS 1
 .Os
 .Sh NAME
@@ -87,9 +87,6 @@ Like the previous usage, it outputs these values to standard
 output, except that it will emit them in
 .Ic eval
 format, suitable for the calling shell.
-The calling shell is determined by examining the entries in the
-.Pa /proc
-file system for the parent process.
 If the shell is known (i.e., it is one of
 .Nm sh , csh , bash , tcsh , ksh , pdksh
 or
@@ -386,21 +383,6 @@ utility does not handle commands with equal
 signs in their
 names, for obvious reasons.
 .Pp
-When eval output is selected, the
-.Pa /proc
-file system must be installed
-and mounted for the shell to be correctly determined, and therefore
-output syntax correct for the running shell.
-The default output is valid for
-.Xr sh 1 ,
-so this means that any
-usage of
-.Nm
-in eval mode prior mounting
-.Pa /proc
-may only occur in standard bourne
-shell scripts.
-.Pp
 The
 .Nm
 utility makes no effort to ensure that resource settings emitted or displayed