Revert "[MM-41576] Revamp database schema version (#19586)" (#19746)

* Revert "[MM-41576] Revamp database schema version (#19586)"

This reverts commit 645fee3fe3.

* Revert "MM-42049 - license endpoint not working (#19686)"

This reverts commit 4fe89e5847.

api4/system_local.go

@@ -18,7 +18,6 @@ func (api *API) InitSystemLocal() {
 	api.BaseRoutes.APIRoot.Handle("/server_busy", api.APILocal(getServerBusyExpires)).Methods("GET")
 	api.BaseRoutes.APIRoot.Handle("/server_busy", api.APILocal(clearServerBusy)).Methods("DELETE")
 	api.BaseRoutes.APIRoot.Handle("/integrity", api.APILocal(localCheckIntegrity)).Methods("POST")
-	api.BaseRoutes.System.Handle("/schema/version", api.APILocal(getAppliedSchemaMigrations)).Methods("GET")
 }
 
 func localCheckIntegrity(c *Context, w http.ResponseWriter, r *http.Request) {