Remove isServerlessFunctionSettingsEnabled feature flag (#9797)

Removes `isFunctionSettingsEnabled` feature flag
We consider this featureFlag as false for everyone. We decided to keep
the code in the code base for now

packages/twenty-front/src/modules/app/hooks/useCreateAppRouter.tsx

@@ -28,7 +28,7 @@ import { SyncEmails } from '~/pages/onboarding/SyncEmails';
 
 export const useCreateAppRouter = (
   isBillingEnabled?: boolean,
-  isServerlessFunctionSettingsEnabled?: boolean,
+  isFunctionSettingsEnabled?: boolean,
   isAdminPageEnabled?: boolean,
 ) =>
   createBrowserRouter(
@@ -62,9 +62,7 @@ export const useCreateAppRouter = (
             element={
               <SettingsRoutes
                 isBillingEnabled={isBillingEnabled}
-                isServerlessFunctionSettingsEnabled={
-                  isServerlessFunctionSettingsEnabled
-                }
+                isFunctionSettingsEnabled={isFunctionSettingsEnabled}
                 isAdminPageEnabled={isAdminPageEnabled}
               />
             }