feat(docs): remove message requests from missing features

Author: yutaplug

src/docs/missing-features.md

@@ -14,5 +14,4 @@ If a feature isn't here, see the [Backports](/documentation/#backports) page in
 |In-game friends|In-game friends|
 |Soundboard|Soundboard in VCs|
 |Security keys|Security key to login|
-|Message requests|Message requests|
-|Managing stickers|Managing stickers in server settings|
+|Managing stickers|Managing stickers in server settings|