[media] rtl28xxu: remove duplicate ID 0458:707f Genius TVGo DVB-T03

That ID was added twice mistakenly.
1st commit ac298ccd
2nd commit 1c1b8734

Revert commit 1c1b8734

Reported-by: Jan Vcelak <jv@fcelda.cz>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>