[MM-52969] Revert "MM-51482_Create Apps Category and link to bots DM (#22918)" (#23647)

* Revert "MM-51482_Create Apps Category and link to bots DM (#22918)"

This reverts commit 1051925eec.

* Revert "MM-51711_Feature flag: APPS sidebar category (#22766)"

This reverts commit 9156205178.

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

@@ -680,7 +680,6 @@ const defaultServerConfig: AdminConfig = {
         GlobalDrafts: true,
         OnboardingTourTips: true,
         DeprecateCloudFree: false,
-        AppsSidebarCategory: false,
         CloudReverseTrial: false,
     },
     ImportSettings: {