staging:rtl8192u: Remove unused enum dm_dig_dbg_e - Style

The enumerated type dm_dig_dbg_e is never used in code so has simply
been removed from the source code.

this is a coding style change which should have no impact on runtime
code execution.
Signed-off-by: John Whitmore <johnfwhitmore@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192u/r8192U_dm.h

@@ -110,12 +110,6 @@ struct dig {
 	long		rssi_val;
 };
 
-typedef enum tag_dig_dbgmode_definition {
-	DIG_DBG_OFF = 0,
-	DIG_DBG_ON = 1,
-	DIG_DBG_MAX
-} dm_dig_dbg_e;
-
 typedef enum tag_dig_connect_definition {
 	DIG_DISCONNECT = 0,
 	DIG_CONNECT = 1,