FIX: remove broken find topic id feature

lib/search.rb

@@ -104,8 +104,6 @@ class Search
         return single_topic(route[:topic_id]).as_json if route[:topic_id].present?
       rescue ActionController::RoutingError
       end
-
-      return single_topic(@term.to_i).as_json if @term =~ /^\d+$/
     end
 
     find_grouped_results.as_json

spec/components/search_spec.rb

@@ -199,16 +199,6 @@ describe Search do
       end
     end
 
-    context "search for a topic by id" do
-      let(:result) { first_of_type(Search.new(topic.id, type_filter: 'topic', min_search_term_length: 1).execute, 'topic') }
-
-      it 'returns the topic' do
-        result.should be_present
-        result[:title].should == topic.title
-        result[:url].should == topic.relative_url
-      end
-    end
-
     context "search for a topic by url" do
       let(:result) { first_of_type(Search.new(topic.relative_url, type_filter: 'topic').execute, 'topic') }