Remove unsupported contact method (mdn#40432)

Author: dotproto

files/en-us/mozilla/add-ons/contact_us/index.md

@@ -22,7 +22,7 @@ Use the [Add-ons Discourse forum](https://discourse.mozilla.org/c/add-ons/35) to
 
 #### Security vulnerabilities
 
-If you discover an add-on security vulnerability, even if the add-on is not hosted on a Mozilla site, please notify us. We will work with the developer to correct the issue. Please report security vulnerabilities [confidentially](https://www.mozilla.org/en-US/about/governance/policies/security-group/bugs/) in [Bugzilla](https://bugzilla.mozilla.org/enter_bug.cgi?product=addons.mozilla.org&component=Add-on%20Security&maketemplate=Add-on%20Security%20Bug&bit-23=1&rep_platform=All&op_sys=All) or by emailing <amo-admins@mozilla.com>.
+If you discover an add-on security vulnerability, even if the add-on is not hosted on a Mozilla site, please notify us. We will work with the developer to correct the issue. Please report security vulnerabilities [confidentially](https://www.mozilla.org/en-US/about/governance/policies/security-group/bugs/) in [Bugzilla](https://bugzilla.mozilla.org/enter_bug.cgi?product=addons.mozilla.org&component=Add-on%20Security&maketemplate=Add-on%20Security%20Bug&bit-23=1&rep_platform=All&op_sys=All).
 
 #### Bugs on addons.mozilla.org (AMO)