docs: remove leftover "Create a can" curl example for deleted endpoint

docs/api.md

@@ -248,17 +248,6 @@ Hard delete immediately (row removed):
 curl -X DELETE -H "Authorization: Bearer TOKEN" http://localhost:8080/api/pastes/ab12cd34/redeem
 ```
 
-Create a can:
-
-```bash
-curl -X POST http://localhost:8080/api/pastes/can \
-  -F "title=My bundle" \
-  -F "expires_in=48h" \
-  -F "custom_slug=my-bundle" \
-  -F 'json_items=[{"title":"notes.txt","content":"some notes"}]' \
-  -F "files=@screenshot.png"
-```
-
 ## Deletion and expiry behavior
 
 - Expired pastes are soft-deleted by a background sweeper that runs every minute.