Remove the dupe MSC3202 flag from hookshot registration

roles/custom/matrix-bridge-hookshot/templates/registration.yml.j2

@@ -33,5 +33,4 @@ rate_limited: false
 de.sorunome.msc2409.push_ephemeral: true
 push_ephemeral: true
 org.matrix.msc3202: true
-org.matrix.msc3202: true
 {% endif %}