Delete a channel metadata - When deleting a specific item of a channel metadata by its key
DELETE {{baseUrl}}/v3/:channel_type/:channel_url/metadata/:key
Delete a channel metadata
Deletes a channel metadata's one or all items that are stored in a channel.
https://sendbird.com/docs/chat/v3/platform-api/guides/user-and-channel-metadata#2-delete-a-channel-metadata
channel_type
     Type: string
     Description: Specifies the type of the channel. Either openchannels or groupchannels.
 channel_url
     Type: string
     Description: Specifies the URL of the channel which has the metadata to delete.
HEADERS
| Key | Datatype | Required | Description | 
|---|---|---|---|
| Api-Token | string | (Required) | 
RESPONSES
status: OK
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