tools: Remove some unnecessary #undefs.

tools/graph2dot.c

@@ -20,7 +20,6 @@
 
 #include <unistd.h>             /* getopt */
 
-#undef HAVE_AV_CONFIG_H
 #include "libavutil/pixdesc.h"
 #include "libavutil/audioconvert.h"
 #include "libavfilter/avfiltergraph.h"

tools/pktdumper.c

@@ -29,8 +29,6 @@
 
 #define PKTFILESUFF "_%08" PRId64 "_%02d_%010" PRId64 "_%06d_%c.bin"
 
-#undef strcat
-
 static int usage(int ret)
 {
     fprintf(stderr, "dump (up to maxpkts) AVPackets as they are demuxed by libavformat.\n");