testprogs: Remove unused includes

Signed-off-by: Martin Storsjö <martin@martin.st>

libavcodec/motion-test.c

@@ -26,8 +26,6 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
-#include <sys/time.h>
-#include <unistd.h>
 
 #include "config.h"
 #include "dsputil.h"

libswscale/colorspace-test.c

@@ -20,7 +20,6 @@
 
 #include <stdio.h>
 #include <string.h>              /* for memset() */
-#include <unistd.h>
 #include <stdlib.h>
 #include <inttypes.h>