staging: rtl8723bs: remove IsHexDigit

Remove function IsHexDigit because it is not used.
Signed-off-by: Nam Cao <namcaov@gmail.com>
Link: https://lore.kernel.org/r/8c70ecd9bea1dff2cb8f69e12bbef6aa4ee39977.1662111799.git.namcaov@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723bs/hal/hal_com.c

@@ -859,25 +859,6 @@ bool eqNByte(u8 *str1, u8 *str2, u32 num)
 	return true;
 }
 
-/*  */
-/* 	Description: */
-/* 		Return true if chTmp is represent for hex digit and */
-/* 		false otherwise. */
-/*  */
-/*  */
-bool IsHexDigit(char chTmp)
-{
-	if (
-		(chTmp >= '0' && chTmp <= '9') ||
-		(chTmp >= 'a' && chTmp <= 'f') ||
-		(chTmp >= 'A' && chTmp <= 'F')
-	)
-		return true;
-	else
-		return false;
-}
-
-
 /*  */
 /* 	Description: */
 /* 		Translate a character to hex digit. */

drivers/staging/rtl8723bs/include/hal_com.h

@@ -147,8 +147,6 @@ u8 GetHalDefVar(struct adapter *adapter, enum hal_def_variable variable,
 
 bool eqNByte(u8 *str1, u8 *str2, u32 num);
 
-bool IsHexDigit(char chTmp);
-
 u32 MapCharToHexDigit(char chTmp);
 
 bool ParseQualifiedString(char *In, u32 *Start, char *Out, char LeftQualifier,