Remove unnecessary api docs link in features.csv

and add indentation to Delete Room API subchapters

doc/source/features.csv

@@ -31,13 +31,12 @@ Synapse Admin API,synadm command group / synadm command
 "  `Block Room API <https://element-hq.github.io/synapse/develop/admin_api/rooms.html#block-room-api>`_",
 "  `Block or unblock a room <https://element-hq.github.io/synapse/develop/admin_api/rooms.html#block-or-unblock-a-room>`_",
 "  `Get block status <https://element-hq.github.io/synapse/develop/admin_api/rooms.html#get-block-status>`_",
-"  `Delete Room API <https://element-hq.github.io/synapse/develop/admin_api/rooms.html#delete-room-api>`_",
-"  `Version 1 (old version) <https://element-hq.github.io/synapse/develop/admin_api/rooms.html#version-1-old-version>`_",
-"  `Version 2 (new version) <https://element-hq.github.io/synapse/develop/admin_api/rooms.html#version-2-new-version>`_",
+"  `Delete Room API Overview <https://element-hq.github.io/synapse/develop/admin_api/rooms.html#delete-room-api>`_",
+"    `Version 1 (old version) <https://element-hq.github.io/synapse/develop/admin_api/rooms.html#version-1-old-version>`_",
+"    `Version 2 (new version) <https://element-hq.github.io/synapse/develop/admin_api/rooms.html#version-2-new-version>`_",
 "  `Status of deleting rooms <https://element-hq.github.io/synapse/develop/admin_api/rooms.html#status-of-deleting-rooms>`_",
 "  `Query by room_id <https://element-hq.github.io/synapse/develop/admin_api/rooms.html#query-by-room_id>`_",
 "  `Query by delete_id <https://element-hq.github.io/synapse/develop/admin_api/rooms.html#query-by-delete_id>`_",
-"  `Response <https://element-hq.github.io/synapse/develop/admin_api/rooms.html#response>`_",
 "  `Undoing room deletions <https://element-hq.github.io/synapse/develop/admin_api/rooms.html#undoing-room-deletions>`_",
 "  `Make Room Admin API <https://element-hq.github.io/synapse/develop/admin_api/rooms.html#make-room-admin-api>`_",
 "  `Check for forward extremities <https://element-hq.github.io/synapse/develop/admin_api/rooms.html#check-for-forward-extremities>`_",