remove proposal

proposals/2529-text-messages-as-captions.md

@@ -1,37 +0,0 @@
-# Use existing m.room.message/m.text events as captions for images
-
-## Background
-
-There is a demand to be able to apply a text caption to an image, as is possible in other chat platforms. In Matrix this is not possible, so people will generally send two events: one `m.image`, then a `m.text` event immediately afterward to simulate a caption.
-
-Better would be to able to explicitly mark an event as a caption.
-
-## Proposal
-
-Allow an optional `m.relates_to` field in the `content` field of a text message event.
-
-Example:
-
-```
-...
-  "content": {
-    "body": "Caption text",
-    "msgtype": "m.text",
-    "m.relates_to": {
-            "event_id": "$(some image event)",
-            "rel_type": "m.caption"
-        }
-  },
-```
-
-If a client recognises the `rel_type`, they can render the caption with the image rather than as a separate message in the timeline.
-
-The benefit of this is that if a client doesn't support or recognise the `m.caption`, it can ignore the relation and just render the message inline.
-
-This would not require aggregation from the server since there will always be a need to send the event separately anyway.
-
-## Potential issues
-
-* Not sure how this relates to the broader questions discussed in MSC1849
-* This is catering to a narrow use-case requirement. There may be a more general solution available
-* Would MSC1767 (extensible events) obsolete this?