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.
Merge pull request #280 from awiddersheim/remove_win_extract_el

Remove extract-win-el.c