12281 zvol_swap_003_pos shouldn't use swapadd in cleanup

@@ -25,10 +25,11 @@
 # Use is subject to license terms.
 #
 
 #
 # Copyright (c) 2013, 2016 by Delphix. All rights reserved.
+# Copyright 2020 Joyent, Inc.
 #
 
 . $STF_SUITE/include/libtest.shlib
 . $STF_SUITE/tests/functional/zvol/zvol_common.shlib
 . $STF_SUITE/tests/functional/zvol/zvol_swap/zvol_swap.cfg

@@ -52,12 +53,10 @@
         [[ -f $NEW_VFSTAB_FILE ]] && log_must rm -f $NEW_VFSTAB_FILE
         [[ -f $PREV_VFSTAB_FILE ]] && \
             log_must mv $PREV_VFSTAB_FILE $VFSTAB_FILE
         [[ -f $PREV_VFSTAB_FILE ]] && rm -f $PREV_VFSTAB_FILE
 
-        log_must swapadd $VFSTAB_FILE
-
         if is_swap_inuse $voldev ; then
                 log_must swap -d $voldev
         fi
 
 }