remove duplicated :remote key from app/views/messages/show.html.erb

Ruby 2.2 shows warning.

git-svn-id: http://svn.redmine.org/redmine/trunk@13836 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/messages/show.html.erb

@@ -5,7 +5,6 @@
     <%= link_to(
           l(:button_quote),
           {:action => 'quote', :id => @topic},
-          :remote => true,
           :method => 'get',
           :class => 'icon icon-comment',
           :remote => true) if !@topic.locked? && authorize_for('messages', 'reply') %>