Remove some outdated resources

_includes/legacy/sections/email-clients.html

@@ -6,7 +6,6 @@
   description="Thunderbird is a free, open source, cross-platform email, newsgroup, news feed, and chat (XMPP, IRC, Twitter) client developed by the Thunderbird community, and previously by the Mozilla Foundation."
   website="https://www.thunderbird.net/"
   privacy-policy="https://www.mozilla.org/privacy/thunderbird/"
-  forum="https://forum.privacytools.io/t/discussion-thunderbird/659"
   source="https://hg.mozilla.org/comm-central/"
   windows="https://www.thunderbird.net"
   mac="https://www.thunderbird.net"
@@ -23,7 +22,6 @@
   website="https://www.mailpile.is/"
   privacy-policy="https://www.mailpile.is/privacy.html"
   tor="clgs64523yi2bkhz.onion"
-  forum="https://forum.privacytools.io/t/"
   github="https://github.com/mailpile/Mailpile"
   linux="https://www.mailpile.is/download/linux.html"
 %}
@@ -34,7 +32,6 @@
   description="Mailvelope is a browser extension that enables the exchange of encrypted emails following the OpenPGP encryption standard."
   website="https://www.mailvelope.com/en"
   privacy-policy="https://www.mailvelope.com/en/privacy-policy"
-  forum="https://forum.privacytools.io/t/"
   github="https://github.com/mailvelope/mailvelope"
   firefox="https://addons.mozilla.org/firefox/addon/mailvelope/"
   chrome="https://chrome.google.com/webstore/detail/mailvelope/kajibbejlbohfaggdiogboambcijhkke?hl"
@@ -51,7 +48,7 @@
 
 <h1 id="mobileclients" class="anchor"><a href="#mobileclients"><i class="fas fa-link anchor-icon"></i></a> Mobile Email Clients</h1>
 
-<h2 id="adroidclients" class="anchor"><a href="#adroidclients"><i class="fas fa-link anchor-icon"></i></a> Android Email Clients</h1>
+<h2 id="adroidclients" class="anchor"><a href="#adroidclients"><i class="fas fa-link anchor-icon"></i></a> Android Email Clients</h2>
 
 {% include legacy/cardv2.html
   title="FairEmail"
@@ -59,7 +56,6 @@
   description="FairEmail is a minimal, open source email app, using open standards (IMAP, SMTP, OpenPGP) with a low data and battery usage."
   website="https://email.faircode.eu/"
   privacy-policy="https://github.com/M66B/FairEmail/blob/master/PRIVACY.md"
-  forum="https://forum.privacytools.io/t/"
   github="https://github.com/M66B/FairEmail"
   fdroid="https://f-droid.org/en/packages/eu.faircode.email/"
   googleplay="https://play.google.com/store/apps/details?id=eu.faircode.email"
@@ -71,13 +67,12 @@
   description="K-9 Mail is an independent mail application that supports both POP3 and IMAP mailboxes, but only supports push mail for IMAP."
   website="https://k9mail.app/"
   privacy-policy="https://k9mail.app/privacy"
-  forum="https://forum.privacytools.io/t/"
   github="https://github.com/k9mail"
   fdroid="https://f-droid.org/packages/com.fsck.k9/"
   googleplay="https://play.google.com/store/apps/details?id=com.fsck.k9"
 %}
 
-<h2 id="iosclients" class="anchor"><a href="#iosclients"><i class="fas fa-link anchor-icon"></i></a> iOS Email Clients</h1>
+<h2 id="iosclients" class="anchor"><a href="#iosclients"><i class="fas fa-link anchor-icon"></i></a> iOS Email Clients</h2>
 
 {% include legacy/cardv2.html
   title="Canary Mail"
@@ -86,7 +81,6 @@
   description="Canary Mail is a paid email client designed to make end-to-end encryption seamless with security features such as a biometric app lock."
   website="https://canarymail.io/"
   privacy-policy="https://canarymail.io/privacy.html"
-  forum="https://forum.privacytools.io/t/"
   ios="https://apps.apple.com/us/app/canary-mail/id1236045954"
 %}
 
@@ -96,4 +90,3 @@
 <ul>
   <li><a href="https://letterbox-app.org/">Letterbox</a> - Letterbox is a free open-source mail client for iOS made as a part of an ongoing research project at the Freie Universität Berlin, Germany.</li>
 </ul>
-