upstart: remove unused FILES-staticdev entry

* default FILES_${PN}-staticdev works correctly in this case

Change-Id: Id62fdcd4b24982014c2e951d83b329ebea4c0d50
Open-webOS-DCO-1.0-Signed-off-by: Martin Jansa <martin.jansa@palm.com>
Reviewed-on: http://g2g.palm.com/1203
Reviewed-by: Build Verification
Reviewed-by: Susan Montooth <susan.montooth@palm.com>
Reviewed-by: Martin Jansa <martin.jansa@palm.com>
Tested-by: Martin Jansa <martin.jansa@palm.com>
Reviewed-by: Herb Kuta <herb.kuta@palm.com>