OPEN Api incorrect request body for delete operations

[david-on-github]

OpenAPI should avoid requestBody for delete operations.

https://github.com/sourcenetwork/defradb/blob/develop/docs/website/references/http/openapi.json

Semantic error at paths./acp/relationship.delete.requestBody
DELETE operations cannot have a requestBody.

Semantic error at paths./collections/{name}.delete.requestBody
DELETE operations cannot have a requestBody.

Semantic error at paths./p2p/collections.delete.requestBody
DELETE operations cannot have a requestBody.

Semantic error at paths./p2p/replicators.delete.requestBody
DELETE operations cannot have a requestBody.