editor: Remove outdated comment from README table

Author: murchandamus

README.mediawiki

@@ -309,7 +309,6 @@ users (see also: [https://en.bitcoin.it/wiki/Economic_majority economic majority
 | Michael Dubrovsky, Bogdan Penkovsky
 | Specification
 | Draft
-<!-- 50 series reserved for a group of post-mortems -->
 |- style="background-color: #ffcfcf"
 | [[bip-0060.mediawiki|60]]
 | Peer Services