Remove /subscribe websocket handler

Having this code is causing crashes for implementations that don't have
dbus-rest enabled in bmcweb, which is deprecated.  This commit is
intended to start a discussion around this issue, and propose simply
removing it.

33a8c53 (checked in July 2020) points
this crash out, and adds a way to disable the feature.  While we could
just make VUE_APP_SUBSCRIBE_SOCKET_DISABLED the default, this seems ill
advised, given the dbus-rest options deprecated status.

Change-Id: I6244f5e2ce895199d5d47cfca9eef36584e8f524
Signed-off-by: Ed Tanous <[email protected]>

.env.intel

@@ -2,7 +2,6 @@ NODE_ENV=production
 VUE_APP_ENV_NAME="intel"
 VUE_APP_COMPANY_NAME="intel"
 VUE_APP_GUI_NAME="BMC System Management"
-VUE_APP_SUBSCRIBE_SOCKET_DISABLED="true"
 VUE_APP_SWITCH_TO_BACKUP_IMAGE_DISABLED="true"
 VUE_APP_MODIFY_SSH_POLICY_DISABLED="true"
 VUE_APP_VIRTUAL_MEDIA_LIST_ENABLED="true"

src/store/index.js

@@ -31,7 +31,6 @@ import FactoryResetStore from './modules/Operations/FactoryResetStore';
 import SnmpAlertsStore from './modules/Settings/SnmpAlertsStore';
 import KeyClearStore from './modules/Operations/KeyClearStore';
 
-import WebSocketPlugin from './plugins/WebSocketPlugin';
 import DateTimeStore from './modules/Settings/DateTimeStore';
 import VirtualMediaStore from './modules/Operations/VirtualMediaStore';
 
@@ -74,5 +73,4 @@ export default new Vuex.Store({
     factoryReset: FactoryResetStore,
     keyClear: KeyClearStore,
   },
-  plugins: [WebSocketPlugin],
 });