selftests: mptcp: join: remove unused vars

Shellcheck found that these variables were set but never used.

Note that rndh is no longer prefixed with '0-' but it doesn't change
anything.
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

tools/testing/selftests/net/mptcp/mptcp_join.sh

@@ -42,7 +42,7 @@ init()
 {
 	capout=$(mktemp)
 
-	rndh=$(printf %x $sec)-$(mktemp -u XXXXXX)
+	rndh=$(mktemp -u XXXXXX)
 
 	ns1="ns1-$rndh"
 	ns2="ns2-$rndh"
@@ -665,8 +665,6 @@ run_tests()
 	addr_nr_ns2="${6:-0}"
 	speed="${7:-fast}"
 	sflags="${8:-""}"
-	lret=0
-	oldin=""
 
 	# create the input file for the failure test when
 	# the first failure test run
@@ -694,7 +692,6 @@ run_tests()
 
 	do_transfer ${listener_ns} ${connector_ns} MPTCP MPTCP ${connect_addr} \
 		${test_linkfail} ${addr_nr_ns1} ${addr_nr_ns2} ${speed} ${sflags}
-	lret=$?
 }
 
 dump_stats()