Do not notify Bugsnag of a cache miss

It's not the responsibility of a error tracking software to track
neither cache misses nor logs. That is what log monitoring is for.

spec/lib/open_food_network/cached_products_renderer_spec.rb

@@ -77,11 +77,6 @@ module OpenFoodNetwork
               cpr.products_json
               expect(cached_json).to eq 'fresh products'
             end
-
-            it "logs a warning" do
-              cpr.should_receive :log_warning
-              cpr.products_json
-            end
           end
 
           describe "when there are no products" do
@@ -104,34 +99,9 @@ module OpenFoodNetwork
               expect(cache_present).to be
               expect(cached_json).to be_nil
             end
-
-            it "logs a warning" do
-              cpr.should_receive :log_warning
-              expect { cpr.products_json }.to raise_error CachedProductsRenderer::NoProducts
-            end
           end
         end
       end
     end
-
-    describe "logging a warning" do
-      it "logs a warning when in production" do
-        Rails.env.stub(:production?) { true }
-        expect(Bugsnag).to receive(:notify)
-        cpr.send(:log_warning)
-      end
-
-      it "logs a warning when in staging" do
-        Rails.env.stub(:production?) { false }
-        Rails.env.stub(:staging?) { true }
-        expect(Bugsnag).to receive(:notify)
-        cpr.send(:log_warning)
-      end
-
-      it "does not log a warning in development or test" do
-        expect(Bugsnag).to receive(:notify).never
-        cpr.send(:log_warning)
-      end
-    end
   end
 end