tools: only include starpu.h as it includes all the other starpu_ .h files

tools/starpu_fxt_tool.c

@@ -19,7 +19,6 @@
  */
 
 #include <starpu.h>
-#include <starpu_fxt.h>
 
 static struct starpu_fxt_options options;
 

tools/starpu_perfmodel_display.c

@@ -23,7 +23,6 @@
 #include <stdio.h>
 
 #include <starpu.h>
-#include <starpu_perfmodel.h>
 
 #ifdef __MINGW32__
 #include <windows.h>

tools/starpu_perfmodel_plot.c

@@ -24,8 +24,6 @@
 #include <limits.h>
 
 #include <starpu.h>
-#include <starpu_perfmodel.h>
-#include <starpu_fxt.h>
 #include <core/perfmodel/perfmodel.h> // we need to browse the list associated to history-based models
 
 #ifdef __MINGW32__