Function delete_identity 

pub async fn delete_identity(
    __arg0: State<App>,
    tn_id: TnId,
    __arg2: IdTag,
    __arg3: Path<String>,
    __arg4: OptionalRequestId,
) -> ClResult<(StatusCode, Json<ApiResponse<()>>)>

DELETE /api/idp/identities/:id - Delete an identity