docs(db): removing unused entities

Signed-off-by: SoXX <soxx@fenpa.ws>

pkg/models/README.md

@@ -11,9 +11,6 @@ Table User {
 Table Post {
   id varchar(25) [primary key]
   rating Rating
-  body text [note: 'Content of the post']
-  user_id integer
-  status post_status
   created_at timestamp
 }