Remove deprecated --id option

Setting the client id is not possible anymore (ory/hydra#2911), but the --id option was still in the docs.

docs/hydra/cli/hydra-clients-create.md

@@ -45,7 +45,6 @@ hydra create client [flags]
  --frontchannel-logout-session-required Boolean flag specifying whether the client requires that a sid (session ID) Claim be included in the Logout Token to identify the client session with the OP when the frontchannel-logout-callback is used. If omitted, the default value is false.
  -g, --grant-type strings A list of allowed grant types (default [authorization_code])
  -h, --help help for create
- --id string Give the client this id
  --jwks-uri string Define the URL where the JSON Web Key Set should be fetched from when performing the "private_key_jwt" client authentication method
  --keybase string Keybase username for encrypting client secret
  --logo-uri string A URL string that references a logo for the client