Remove NotificationController (#4815)

Removes the `NotificationController` in favor of
`NotificationServicesController`, see
#4809

Author: hmalik88

.github/CODEOWNERS

@@ -34,7 +34,6 @@
 /packages/phishing-controller              @MetaMask/product-safety
 
 ## Snaps Team
-/packages/notification-controller          @MetaMask/snaps-devs
 /packages/rate-limit-controller            @MetaMask/snaps-devs
 
 ## Wallet API Platform Team
@@ -86,8 +85,6 @@
 /packages/message-manager/CHANGELOG.md            @MetaMask/confirmations @MetaMask/wallet-framework-engineers
 /packages/name-controller/package.json            @MetaMask/confirmations @MetaMask/wallet-framework-engineers
 /packages/name-controller/CHANGELOG.md            @MetaMask/confirmations @MetaMask/wallet-framework-engineers
-/packages/notification-controller/package.json    @MetaMask/snaps-devs @MetaMask/wallet-framework-engineers
-/packages/notification-controller/CHANGELOG.md    @MetaMask/snaps-devs @MetaMask/wallet-framework-engineers
 /packages/notification-services-controller/package.json @MetaMask/notifications @MetaMask/wallet-framework-engineers
 /packages/notification-services-controller/CHANGELOG.md @MetaMask/notifications @MetaMask/wallet-framework-engineers
 /packages/phishing-controller/package.json    @MetaMask/product-safety @MetaMask/wallet-framework-engineers

README.md

@@ -41,7 +41,6 @@ Each package in this repository has its own README where you can find installati
 - [`@metamask/multichain`](packages/multichain)
 - [`@metamask/name-controller`](packages/name-controller)
 - [`@metamask/network-controller`](packages/network-controller)
-- [`@metamask/notification-controller`](packages/notification-controller)
 - [`@metamask/notification-services-controller`](packages/notification-services-controller)
 - [`@metamask/permission-controller`](packages/permission-controller)
 - [`@metamask/permission-log-controller`](packages/permission-log-controller)
@@ -85,7 +84,6 @@ linkStyle default opacity:0.5
   multichain(["@metamask/multichain"]);
   name_controller(["@metamask/name-controller"]);
   network_controller(["@metamask/network-controller"]);
-  notification_controller(["@metamask/notification-controller"]);
   notification_services_controller(["@metamask/notification-services-controller"]);
   permission_controller(["@metamask/permission-controller"]);
   permission_log_controller(["@metamask/permission-log-controller"]);
@@ -141,7 +139,6 @@ linkStyle default opacity:0.5
   network_controller --> controller_utils;
   network_controller --> eth_json_rpc_provider;
   network_controller --> json_rpc_engine;
-  notification_controller --> base_controller;
   notification_services_controller --> base_controller;
   notification_services_controller --> controller_utils;
   notification_services_controller --> keyring_controller;