Demote unstable tests from daily run (#29147)

* Demote unstable tests from daily run

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

e2e-tests/cypress/tests/integration/channels/system_console/site_configuration/link_customization_e20_1_spec.js

@@ -7,7 +7,6 @@
 // - Use element ID when selecting an element. Create one if none.
 // ***************************************************************
 
-// Stage: @prod
 // Group: @channels @system_console @enterprise @e20_only @not_cloud
 
 import * as TIMEOUTS from '../../../../fixtures/timeouts';

e2e-tests/cypress/tests/integration/channels/system_console/site_configuration/link_customization_e20_2_spec.js

@@ -7,7 +7,6 @@
 // - Use element ID when selecting an element. Create one if none.
 // ***************************************************************
 
-// Stage: @prod
 // Group: @channels @not_cloud @system_console
 
 import {

e2e-tests/cypress/tests/integration/channels/system_console/ui_and_api/customization_not_cloud_spec.js

@@ -7,7 +7,6 @@
 // - Use element ID when selecting an element. Create one if none.
 // ***************************************************************
 
-// Stage: @prod
 // Group: @channels @not_cloud @system_console
 
 import * as TIMEOUTS from '../../../../fixtures/timeouts';