starpufft/starpufftx.c: remove un-needed include pthread.h

starpufft/starpufftx.c

@@ -1,7 +1,7 @@
 /* StarPU --- Runtime system for heterogeneous multicore architectures.
  *
  * Copyright (C) 2009-2012  Université de Bordeaux 1
- * Copyright (C) 2010, 2011, 2012, 2013  Centre National de la Recherche Scientifique
+ * Copyright (C) 2010, 2011, 2012, 2013, 2014  Centre National de la Recherche Scientifique
  *
  * StarPU is free software; you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as published by
@@ -18,7 +18,6 @@
 #define PARALLEL 0
 
 #include <math.h>
-#include <pthread.h>
 #include <unistd.h>
 #include <sys/time.h>