configurehood: Don't offer hoodfile when using local hoodfile

When using local hoodfile neither this nor central hoodfile
downloaded earlier should be offered to neighbours, so remove it
from the webroot.

Signed-off-by: Fabian Bläse <fabian@blaese.de>
Reviewed-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Reviewed-by: Robert Langhammer <rlanghammer@web.de>