remove plan file

backend/plan

@@ -1,28 +0,0 @@
-# Structure
-
-## users
-- id
-- name
-- email
-- hash
-- admin
-- updated_at
-- created_at
-
-## warrens
-- id
-- name
-- path
-- allow_children
-- updated_at
-- created_at
-
-## user_warrens
-- user_id
-- warren_id
-- can_create_children (the user-specific flag, the warren's `allow_children` takes precedence so that both flags have to be enabled)
-- can_list_files (see and traverse the layout of the warren's directories and files)
-- can_read_files (read contents of the warren's files)
-- can_modify_files (edit contents of the warren's files)
-- can_delete_files (delete files and directories)
-- can_delete_warren (delete the warren and all its contents)