[menu.yaml] Remove duplicated community info in git menu

This code removes the community panels from the git menu. Thus,
it avoids to show duplicated information which is already visible
in the community menu.

menu.yaml

@@ -13,12 +13,6 @@
     panel: panels/json/git_demographics.json
   - name: Areas of code
     panel: panels/json/git_areas_of_code.json
-  - name: Community Structure Overall
-    panel: panels/json/onion_overall.json
-  - name: Community Structure by project
-    panel: panels/json/onion_projects.json
-  - name: Community Structure by organization
-    panel: panels/json/onion_organizations.json
 - name: Gerrit
   source: gerrit
   icon: default.png