Remove leaderboards (Issue #163)

Author: likeath

apps/web/assets/stylesheets/_leaderboard.scss

@@ -1,4 +1,3 @@
-@import 'leaderboard';
 @import 'settings';
 @import 'buttons';
 @import 'labels';

apps/web/assets/stylesheets/main.scss

@@ -1,7 +1,5 @@
 root to: 'main#index'
 
-get '/leaderboards', to: 'leaderboards#index'
-
 get '/about',        to: 'static#about', as: 'about'
 get '/how-to-help',  to: 'static#help',  as: 'help'