test/TEST-10-ISSUE-2467: remove testsuite.service TimeoutStartSec

This test runs under qemu, which may run on some testbeds without
acceleration; in those cases, a 10s timeout is frequently too short.

Simply removing the timeout to allow the default timeoutsec should
be enough time for the test to finish, even on very slow testbeds.

test/TEST-10-ISSUE-2467/test.sh

@@ -25,7 +25,6 @@ Type=oneshot
 StandardOutput=tty
 StandardError=tty
 ExecStart=/bin/sh -e -x -c 'rm -f /tmp/nonexistent; systemctl start test.socket; printf x > test.file; socat -t20 OPEN:test.file UNIX-CONNECT:/run/test.ctl; >/testok'
-TimeoutStartSec=10s
 EOF
 
 	cat  >$initdir/etc/systemd/system/test.socket <<'EOF'