package/midori: drop select of libsoup-gnome

libsoup-gnome is not used by midori since bump to version 9.0 in commit
42f19d49 and
https://github.com/midori-browser/core/commit/0c2d8f0ea61f20476542e861bc1772a878a54d32



Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>