remove unused headers.

src/engine_maketasks.c

@@ -26,13 +26,7 @@
 #include "../config.h"
 
 /* Some standard headers. */
-#include <float.h>
-#include <limits.h>
-#include <sched.h>
-#include <stdbool.h>
-#include <stdio.h>
 #include <stdlib.h>
-#include <string.h>
 #include <unistd.h>
 
 /* MPI headers. */
@@ -40,10 +34,6 @@
 #include <mpi.h>
 #endif
 
-#ifdef HAVE_LIBNUMA
-#include <numa.h>
-#endif
-
 /* Load the profiler header, if needed. */
 #ifdef WITH_PROFILER
 #include <gperftools/profiler.h>