Project limit is reached warning is hidden when the projects_limit is zero

Fixes #12791

CHANGELOG

@@ -64,6 +64,7 @@ v 8.5.0 (unreleased)
   - Fix broken link to project in build notification emails
   - Ability to see and sort on vote count from Issues and MR lists
   - Fix builds scheduler when first build in stage was allowed to fail
+  - User project limit is reached notice is hidden if the projects limit is zero 
 
 v 8.4.4
   - Update omniauth-saml gem to 1.4.2

app/views/shared/_project_limit.html.haml

-- if cookies[:hide_project_limit_message].blank? && !current_user.hide_project_limit && !current_user.can_create_project?
+- if cookies[:hide_project_limit_message].blank? && !current_user.hide_project_limit && !current_user.can_create_project? && current_user.projects_limit > 0
   .project-limit-message.alert.alert-warning.hidden-xs
     You won't be able to create new projects because you have reached your project limit.