remove self hosted expansion flag in favor of grouping hosted expansion with hosted purhcase and it's flag.

e2e-tests/playwright/support/server/default_config.ts

@@ -170,7 +170,6 @@ const defaultServerConfig: AdminConfig = {
         EnableCustomGroups: true,
         SelfHostedPurchase: true,
         AllowSyncedDrafts: true,
-        SelfHostedExpansion: false,
     },
     TeamSettings: {
         SiteName: 'Mattermost',