Don't include matrix.org in the room directory on onion installs

src/freedombone-app-riot

@@ -321,8 +321,7 @@ function install_riot {
           echo '    "enableLabs": false,';
           echo '    "roomDirectory": {';
           echo '        "servers": [';
-          echo "            \"${MATRIX_ONION_DOMAIN_NAME}\",";
-          echo '            "matrix.org"';
+          echo "            \"${MATRIX_ONION_DOMAIN_NAME}\"";
           echo '        ]';
           echo '    }';
           echo '}'; } > "$riot_config_file"