package/ussp-push: removed deprecated/no longer needed deps on openobex-bluez

package/ussp-push: removed deprecated/no longer needed deps on openobex-bluez

Commit 49a9fb0f13789298e65f21405502a9106e2c7382 removed the
BR2_PACKAGE_OPENOBEX_BLUEZ option, because BlueZ support is now
unconditionally included in OpenOBEX. Therefore, selecting this legacy
option no longer makes sense, and in fact triggers the legacy handling
for no reason.

Cc: Bernd Kuhls <bernd.kuhls@t-online.de>
Reported-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Samuel Martin <s.martin49@gmail.com>
[Thomas: tweak commit log.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>