Apply suggestions from code review

Co-Authored-By: Travis Ralston <travpc@gmail.com>

docs/config.md

@@ -24,7 +24,7 @@ For a good example, see https://riot.im/develop/config.json.
    * As of Riot 1.4.0, identity servers are optional. See [Identity servers](#identity-servers) below.
 1. `features`: Lookup of optional features that may be `enable`d, `disable`d, or
    exposed to the user in the `labs` section of settings. The available
-   optional experimental features vary from release to release and are (usually) [documented](labs.md). The feature flag process is
+   optional experimental features vary from release to release and are [documented](labs.md). The feature flag process is
    [documented](feature-flags.md) as well.
 1. `showLabsSettings`: Shows the "labs" tab of user settings even when no `features` are enabled
    or present. Useful for getting at settings which may be otherwise hidden.