fix channel validation error

app/views/channels/_edit.html.erb

@@ -1,13 +1,6 @@
 <div class="FL">
 
   <%= form_for @channel, :html => {:method => 'put'} do |c| %>
-   <% unless session[:errors].nil?
-      session[:errors].each do |attr, msg|
-        @channel.errors.add(attr, msg)
-      end
-      session[:errors] = nil %>
-   <% end %>
-
     <p>
       <%= error_messages_for 'channel', :header_message => t(:try_again), :message => t(:channel_error) %>
     </p>