Related to #30326
Before #30326, when calling html_sanitize, some content may be escaped
when it shouldn't. A simple example was images with cid links containing @.
(a first fix for another use case was made in 8aff53733b)
We suspect that this escaping (added in 71a92f46e4)
was made to avoid loosing email with format '<email@domaine>' in html_sanitize
to escape them if html_sanitize is called on plain text.
Anyway, only html should be passed to html_sanitize, and therefore email of format
<email@domain> should already be escaped.
PR #30326 fixes the unwanted behaviour in 12.0 and this commit removes
this logic in master.
closesodoo/odoo#30815
XavierDo
b8f2edd94c