6197 get rid of unused checks in fs-root and fs-usr boot scripts

@@ -19,10 +19,11 @@
 #
 # CDDL HEADER END
 #
 #
 # Copyright (c) 1992, 2010, Oracle and/or its affiliates. All rights reserved.
+# Copyright 2015 Nexenta Systems, Inc. All rights reserved.
 #
 
 # Make sure that the libraries essential to this stage of booting can be found.
 LD_LIBRARY_PATH=/lib; export LD_LIBRARY_PATH
 

@@ -72,36 +73,11 @@
 # reside on /usr minimizing the space required by the root file
 # system.
 #
 readvfstab "/usr" < $vfstab
 if [ -n "$mountp" ]; then
-        if [ "$fstype" = cachefs ]; then
-                #
-                # Mount without the cache initially.  We'll enable it
-                # later at remount time.  This lets us avoid
-                # teaching the statically linked mount program about
-                # cachefs.  Here we determine the backfstype.
-                # This is not pretty, but we have no tools for parsing
-                # the option string until we get /usr mounted...
-                #
-                case "$mntopts" in
-                *backfstype=nfs*)
-                        cfsbacktype=nfs
-                        ;;
-                *backfstype=hsfs*)
-                        cfsbacktype=hsfs
-                        ;;
-                *)
-                        msg='invalid vfstab entry for /usr'
-                        echo $msg
-                        echo "$SMF_FMRI:" $msg >/dev/msglog
-                        cfsbacktype=nfs
-                        ;;
-                esac
-                mountfs - /usr $cfsbacktype ro $special ||
-                    exit $SMF_EXIT_ERR_FATAL
-        elif [ "$fstype" = zfs ]; then
+        if [ "$fstype" = zfs ]; then
                 mountfs - /usr $fstype $mntopts - || exit $SMF_EXIT_ERR_FATAL
         else
                 #
                 # Must use -o largefiles here to ensure the
                 # read-only mount does not fail as a result of