Remove Services count from usage ping payload.

This query was timing out and is blocking the sync of usage data for
GitLab.com

lib/gitlab/usage_data.rb

@@ -40,7 +40,6 @@ module Gitlab
             projects_prometheus_active: PrometheusService.active.count,
             protected_branches: ProtectedBranch.count,
             releases: Release.count,
-            services: Service.where(active: true).count,
             snippets: Snippet.count,
             todos: Todo.count,
             uploads: Upload.count,

spec/lib/gitlab/usage_data_spec.rb

@@ -50,7 +50,6 @@ describe Gitlab::UsageData do
         pages_domains
         protected_branches
         releases
-        services
         snippets
         todos
         uploads