Revert "Fixing Info.plist.in for qmlobserver and qmldump"

The Info.plist.in files are actually handled by static.pro.
The projects should only be compiled from the deployed sources in the
build tree.

This reverts commit 30c602f4.

Change-Id: Ib63fb9e4db1c249817e59239029db7dd220ba5b3
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>
Reviewed-by: Kai Koehne <kai.koehne@digia.com>