staging: mt7621-mmc: Delete N_MSG() and all its users

This patch removes N_MSG() and all its users since it is a no-op.
Signed-off-by: Nishad Kamdar <nishadkamdar@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/mt7621-mmc/dbg.h

@@ -102,16 +102,6 @@ do { \
 } while (0)
 #endif /* end of +++ */
 
-#define N_MSG(evt, fmt, args...)
-/*
-do {    \
-    if ((DBG_EVT_##evt) & sd_debug_zone[host->id]) { \
-        printk(KERN_ERR TAG"%d -> "fmt" <- %s() : L<%d> PID<%s><0x%x>\n", \
-            host->id,  ##args , __FUNCTION__, __LINE__, current->comm, current->pid);	\
-    } \
-} while(0)
-*/
-
 #define ERR_MSG(fmt, args...) \
 do { \
 	printk(KERN_ERR TAG"%d -> "fmt" <- %s() : L<%d> PID<%s><0x%x>\n", \