README: do not expose internal e-mail addresses

There is really no justified reason why anyone would mail everyone
enlisted in GURU.  We have Bugzilla and mailing lists.

Signed-off-by: Michał Górny <mgorny@gentoo.org>

README.md

@@ -44,10 +44,3 @@ The [GURU rules](https://wiki.gentoo.org/wiki/Project:GURU#Rules), and the Gento
 - https://dev.gentoo.org/~mgorny/python-guide/eclass.html
 - [GURU outdated packages](https://repology.org/projects/?inrepo=gentoo_ovl_guru&outdated=on)
 - [GURU Bugs](https://bugs.gentoo.org/buglist.cgi?f1=product&f2=component&list_id=7042152&o1=equals&query_format=advanced&resolution=---&v1=GURU&v2=Package%20issues)
-
-## Email Addresses <a name="email"></a>
-
-- guru@gentoo.org (Reach everyone involved in GURU)
-- guru-committers@gentoo.org (Reach all contributors)
-- guru-trusted@gentoo.org (Reach the [trusted contributors](https://wiki.gentoo.org/wiki/Project:GURU/Information_for_Trusted_Contributors))
-- guru-devs@gentoo.org (Reach the Gentoo developers involved in GURU)