manifest: electric-eel manifest cannot contain itself as a project

Remove electric-eel from projects section of manifest. electric-eel
project is implied from the 'self' section.
Fixes MALFORMED manifest file error when running west init with url

BUG=None
TEST=west init -m <electric-eel url>
     west update

Signed-off-by: Al Semjonovs <asemjonovs@google.com>
Change-Id: Ib483863d181caa016916294616b951deedf956ae
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/electric-eel/+/4021127
Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org>
1 file changed