Dont show blocked users in autocomplete

app/assets/javascripts/users_select.js.coffee

@@ -24,6 +24,7 @@ $ ->
       data: (term, page) ->
         search: term # search term
         per_page: 10
+        active: true
         private_token: gon.api_token
 
       results: (data, page) -> # parse the results into the format expected by Select2.

lib/api/users.rb

@@ -10,6 +10,7 @@ module Gitlab
       #  GET /users
       get do
         @users = User.scoped
+        @users = @users.active if params[:active].present?
         @users = @users.search(params[:search]) if params[:search].present?
         present @users, with: Entities::User
       end