deploy/routeros.sh: remove all certificates

As the script is applying the fullchain which includes three certificates,
delete all of them before applying updated certificate.

Signed-off-by: Andreas Bießmann <andreas@biessmann.org>

deploy/routeros.sh

@@ -134,6 +134,7 @@ routeros_deploy() {
 source=\"## generated by routeros deploy script in acme.sh;\
 \n/certificate remove [ find name=$_cdomain.cer_0 ];\
 \n/certificate remove [ find name=$_cdomain.cer_1 ];\
+\n/certificate remove [ find name=$_cdomain.cer_2 ];\
 \ndelay 1;\
 \n/certificate import file-name=$_cdomain.cer passphrase=\\\"\\\";\
 \n/certificate import file-name=$_cdomain.key passphrase=\\\"\\\";\