Remove unnecessary attribute caching

lib/paperclip/attachment.rb

@@ -324,8 +324,6 @@ module Paperclip
       setter = :"#{name}_#{attr}="
       if instance.respond_to?(setter)
         instance.send(setter, value)
-      else
-        self.instance_variable_set("@_#{setter.to_s.chop}", value)
       end
     end
 
@@ -335,8 +333,6 @@ module Paperclip
       getter = :"#{name}_#{attr}"
       if instance.respond_to?(getter)
         instance.send(getter)
-      else
-        self.instance_variable_get("@_#{getter}")
       end
     end
 

test/attachment_test.rb

@@ -1083,16 +1083,8 @@ class AttachmentTest < Test::Unit::TestCase
       assert_nothing_raised { @dummy.avatar = @file }
     end
 
-    should "return the time when sent #avatar_updated_at" do
-      now = Time.now
-      Time.stubs(:now).returns(now)
+    should "not return the time when sent #avatar_updated_at" do
       @dummy.avatar = @file
-      assert_equal now.to_i, @dummy.avatar.updated_at.to_i
-    end
-
-    should "return nil when reloaded and sent #avatar_updated_at" do
-      @dummy.save
-      @dummy.reload
       assert_nil @dummy.avatar.updated_at
     end