Prevent duplicated code by changing the url
title retrieving method to use the existing one
from mail.
As the title retrieving method is now limited to
the <head> of the html, remove the unnecessary
check on the content max size which was previously
added to prevent memory limit from exceeding
when the html content was too big.
Task-3234864
Part-of: odoo/odoo#122087
amdi-odoo
bdfc1fb4c6