Update area owners (#29743)

docs/area-owners.md

@@ -2,21 +2,15 @@ The below table lists all the `area-`labels used in the `aspnetcore` repository
 
 | Area label | Owner | Description|
 |--- | ---| --- |
-| area-azure | BrennanConroy | |
 | area-blazor | mkArtakMSFT | Blazor server and Blazor WASM related |
 | area-commandlinetools |  mkArtakMSFT | dev certs, dotnet watch,  |
 | area-dataprotection | Pilchie | |
 | area-grpc | shirhatti | |
 | area-healthchecks | mkArtakMSFT | |
-| area-hosting | BrennanConroy | |
 | area-identity | blowdart | |
 | area-infrastructure | dougbu | |
-| area-installers | dougbu | |
-| area-middleware | BrennanConroy | |
 | area-mvc | mkArtakMSFT | |
 | area-perf | sebastienros | |
-| area-platform | JunTaoLuo | |
 | area-security | blowdart | |
 | area-servers | BrennanConroy | |
 | area-signalr | BrennanConroy | |
-| area-websockets | BrennanConroy | |