staging: rtl8723bs: remove defined but not used 'dB_Invert_Table'

Fix the following gcc warning:

drivers/staging/rtl8723bs/hal/odm.c:10:18: warning: ‘dB_Invert_Table’
defined but not used [-Wunused-const-variable=]
 static const u16 dB_Invert_Table[8][12] = {
                  ^~~~~~~~~~~~~~~
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Jason Yan <yanaijie@huawei.com>
Link: https://lore.kernel.org/r/20200417073439.41888-1-yanaijie@huawei.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723bs/hal/odm.c

@@ -7,19 +7,6 @@
 
 #include "odm_precomp.h"
 
-static const u16 dB_Invert_Table[8][12] = {
-	{1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 4, 4},
-	{4, 5, 6, 6, 7, 8, 9, 10, 11, 13, 14, 16},
-	{18, 20, 22, 25, 28, 32, 35, 40, 45, 50, 56, 63},
-	{71, 79, 89, 100, 112, 126, 141, 158, 178, 200, 224, 251},
-	{282, 316, 355, 398, 447, 501, 562, 631, 708, 794, 891, 1000},
-	{1122, 1259, 1413, 1585, 1778, 1995, 2239, 2512, 2818, 3162, 3548, 3981},
-	{4467, 5012, 5623, 6310, 7079, 7943, 8913, 10000, 11220, 12589, 14125,
-	 15849},
-	{17783, 19953, 22387, 25119, 28184, 31623, 35481, 39811, 44668, 50119,
-	 56234, 65535}
- };
-
 /*  Global var */
 
 u32 OFDMSwingTable[OFDM_TABLE_SIZE] = {