staging: dgnc: remove ununsed Macro

Remove the ununsed Macro
Signed-off-by: Hari Prasath Gujulan Elango <hgujulan@visteon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/dgnc/dgnc_driver.h

@@ -66,7 +66,6 @@
 
 /* 4 extra for alignment play space */
 #define WRITEBUFLEN		((4096) + 4)
-#define MYFLIPLEN		N_TTY_BUF_SIZE
 
 #define dgnc_jiffies_from_ms(a) (((a) * HZ) / 1000)