Remove extract-win-el.c

This seems to be a stand alone testing application that was developed. I'm not sure how much anyone uses it if at all. Might have just been for experimentation before putting the final event log code together for the Windows agent. I don't see any value in keeping it around. Just more code to search through and confuse people new to working on the project.

I'm open to anyone having differing opinions about this. Also, if anyone knows more about this than I do please chime in. If it's a really good testing tool that should be kept than perhaps moving it or documenting it as such would be better.