Yep! you can. When you edit a
raw file, in the vast majority of instances, you don't actually save any edits over the original file.
(I'm not 100% sure on how Adobe works) But from what I have worked with, Adobe software will write the edits on the
raw file into a separate file, and automatically link this new file to the
raw file for it's own purposes.
If you find this small Adobe generated file(should be an xml file type) and delete it, your Adobe software will no longer see the
raw file as it once did, and everything is reset back to square one!
This is the extreme and tedious way to do it, and there should be a reset, undo or revert function, where you de-apply any or all edit steps to the
raw file.