How do I delete or remove temporary assets? Images were uploaded to a matrix field and then the changes were not saved, but the assets still show up in the control panel as selectable. 

The asset seems to be stored here:

http://example.com/admin/resources/tempassets/field_51/file_name.jpg

I'd like to delete or remove these so that we dont't have them laying around taking up the desired file name. If I upload the same image again it appends a _x to the end of the file name as the number of times it's been uploaded.

I can't find the assets anywhere in the assets page in the control panel.
From my comment above: 

I was able to find the files uploaded to the root of my assets path and deleted them there.

Then on the control panel settings page:

Updated Asset Indexes and Cleared Cache and it seems to be all working.