Delete unused NULLSTR macro

Spotted by clang:

xdpyinfo.c:145:9: warning: macro is not used [-Wunused-macros]
        ^

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>

1 files changed, 0 insertions, 3 deletions

diff --git a/xdpyinfo.c b/xdpyinfo.c
index a0e0045..152e32c 100644
--- a/xdpyinfo.c
+++ b/xdpyinfo.c
@@ -141,9 +141,6 @@ in this Software without prior written authorization from The Open Group.
 #include <stdio.h>
 #include <stdlib.h>
 
-/* Turn a NULL pointer string into an empty string */
-#define NULLSTR(x) (((x)!=NULL)?(x):(""))
-
 static char *ProgramName;
 static Bool queryExtensions = False;