media: dvb-usb: dib0700_devices: Remove unused struct dibx090p_adc

After commit 5e9c85d("[media] dib8096: enhancement"), no one use struct
dibx090p_adc, so remove it.

Link: https://lore.kernel.org/linux-media/20220927133827.99097-1-yuancan@huawei.com
Signed-off-by: Yuan Can <yuancan@huawei.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/usb/dvb-usb/dib0700_devices.c

@@ -2024,13 +2024,6 @@ static struct dib0090_config tfe8096p_dib0090_config = {
 	.force_cband_input		= 0,
 };
 
-struct dibx090p_adc {
-	u32 freq;			/* RF freq MHz */
-	u32 timf;			/* New Timf */
-	u32 pll_loopdiv;	/* New prediv */
-	u32 pll_prediv;		/* New loopdiv */
-};
-
 struct dibx090p_best_adc {
 	u32 timf;
 	u32 pll_loopdiv;