Rename Problem to Translation

app/views/problems/show.html.erb

@@ -1,17 +0,0 @@
-<% if notice %>
-    <p id="notice"><%= notice %></p>
-<% end %>
-
-<div class="page-header">
-  <h1><%= @problem.title %> <small>Problem <%= @problem.id %></small></h1>
-</div>
-
-<%= panel do %>
-    <div class="panel-body problem-content">
-        <%= sanitize @problem.content %>
-    </div>
-<% end %>
-<div class="text-center">
-  <%= link_to 'Dieses Problem auf projecteuler.net', @problem.original_url, target: '_blank' %>
-</div>
-<%= link_to 'Edit', edit_problem_path(@problem), class: 'btn btn-default' %>