Remove 'saml2' from extras, as it is currently broken

synapse-module/default.nix

@@ -19,7 +19,6 @@ let
     inherit (cfg) plugins;
     extras = [
       "postgres"
-      "saml2"
       "oidc"
       "systemd"
       "url-preview"
@@ -27,7 +26,6 @@ let
       "jwt"
       "redis"
       "cache-memory"
-      "user-search"
     ];
   };