[REF] mail: consider body in message_post is always html

Purpose of this commit is to simplify a bit message_post API. It has
a content_subtype parameter allowing to receive plaintext content.
It is then automatically converted into html.

This commit removes the parameter and consider the content is always
html. Code calling message_post should handle the conversion. In Odoo
the only use was in the chat_post controller that now perform the
plaintext to html conversion before calling message_post.

This commit is purely technical and does not hold any functional change.
Purpose is to clean code in order to prepare future changes in mail
application.

0 files changed, 0 insertions, 0 deletions