Move menu items from settings into partial

Better ability to set active and enabled values

app/config/sculpin_site.yml

@@ -12,22 +12,6 @@ eventbrite:
 papercall:
     url: https://www.papercall.io/drupalcamp-bristol-2019
 
-main_menu:
-    - title: Tickets
-      url: '%eventbrite.url%'
-      pattern: ~
-      enabled: '%tickets.available%'
-
-    - title: Submit a session
-      url: '%papercall.url%'
-      pattern: ~
-      enabled: '%cfp.open%'
-
-    - title: Sponsor us
-      url: /sponsor-us
-      pattern: /^\/sponsor-us\/?/
-      enabled: true
-
 tickets:
     available: true
     url: '%eventbrite.url%'