use stdbool instead of boolean.h (#6853)

Author: CoolSpy3

projects/samples/contests/ratslife/controllers/contest_manager/boolean.h

@@ -21,7 +21,7 @@
 #ifndef MAZE_DEFINITION_H
 #define MAZE_DEFINITION_H
 
-#include "boolean.h"
+#include <stdbool.h>
 #include "linked_list.h"
 // enum
 typedef enum { North, South, East, West, None } Orientation;

projects/samples/contests/ratslife/controllers/contest_manager/maze_definition.h

@@ -20,7 +20,7 @@
 
 #include "round_manager.h"
 
-#include "boolean.h"
+#include <stdbool.h>
 #include "helper.h"
 
 #include <math.h>

projects/samples/contests/ratslife/controllers/contest_manager/round_manager.c

@@ -22,7 +22,7 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include "boolean.h"
+#include <stdbool.h>
 #include "helper.h"
 #include "parameters.h"
 #include "texture_generator.h"