Revert "AccessControl: Implement a way to register fixed roles (#35641)" (#37397)

This reverts commit 88c11f1cc0.

pkg/api/http_server.go

@@ -117,7 +117,8 @@ func (hs *HTTPServer) Init() error {
 
 	hs.macaron = hs.newMacaron()
 	hs.registerRoutes()
-	return hs.declareFixedRoles()
+
+	return nil
 }
 
 func (hs *HTTPServer) AddMiddleware(middleware macaron.Handler) {