testing: Remove unused revocation and constraints plugins for swanctl

swanctl doesn't do any (online) certificate validation, it just parses
and or decrypts them and passes them on to the daemon.

testing/tests/ikev2-multi-ca/loop/hosts/carol/etc/strongswan.conf

@@ -1,7 +1,7 @@
 # /etc/strongswan.conf - strongSwan configuration file
 
-swanctl {
-  load = pem pkcs1 x509 revocation constraints pubkey openssl random
+ swanctl {
+  load = pem pkcs1 x509 pubkey openssl random
 }
 
 charon-systemd {

testing/tests/ikev2-multi-ca/loop/hosts/moon/etc/strongswan.conf

@@ -1,7 +1,7 @@
 # /etc/strongswan.conf - strongSwan configuration file
 
-swanctl {
-  load = pem pkcs1 x509 revocation constraints pubkey openssl random
+ swanctl {
+  load = pem pkcs1 x509 pubkey openssl random
 }
 
 charon-systemd {