mono/MonoGame — pull request #1716 by danzel (2013-05-08 10:01:43+00:00)
Title: Remove File extension check that only causes failure.

If you have a file named something like "button.down.png" and try load it with ```content.Load("button.down")``` then we fail to load it as we detect it has an extension in the file name.

This check appears to be unnecessary as there is a check for the file existing a few lines above, also it differs from XNA behaviour, where files named like this work fine.