dmails: remove unused edit template and update route.

app/views/dmails/edit.html.erb

@@ -1,12 +0,0 @@
-<div id="c-dmails">
-  <div id="a-edit">
-    <h1>Edit Message</h1>
-    <%= render "form", :dmail => @dmail %>
-  </div>
-</div>
-
-<%= render "secondary_links" %>
-
-<% content_for(:page_title) do %>
-  Edit Message - <%= Danbooru.config.app_name %>
-<% end %>

config/routes.rb

@@ -110,7 +110,7 @@ Rails.application.routes.draw do
     end
   end
   resources :delayed_jobs, :only => [:index]
-  resources :dmails do
+  resources :dmails, :only => [:new, :create, :index, :show, :destroy] do
     collection do
       get :search
       post :mark_all_as_read