Revert "Fix parallelism in modular-eager-prefetch: the eager component should pull from can_push emitters, instead of pushing from above"

This reverts commit b3f58fbc09c69e93410a4aa67ec93afea27d02c9.

starpu_sched_component_pump_to returns a task to be pushed back when it
can't be pushed

src/sched_policies/component_eager.c

@@ -2,7 +2,7 @@
  *
  * Copyright (C) 2013                                     Inria
  * Copyright (C) 2017                                     CNRS
- * Copyright (C) 2014-2018                                Université de Bordeaux
+ * Copyright (C) 2014-2017                                Université de Bordeaux
  *
  * 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
@@ -66,13 +66,6 @@ static int eager_push_task(struct starpu_sched_component * component, struct sta
 	return 1;
 }
 
-static int eager_can_push(struct starpu_sched_component * component, struct starpu_sched_component * to)
-{
-	int success;
-	starpu_sched_component_pump_to(component, to, &success);
-	return success;
-}
-
 int starpu_sched_component_is_eager(struct starpu_sched_component * component)
 {
 	return component->push_task == eager_push_task;
@@ -83,7 +76,6 @@ struct starpu_sched_component * starpu_sched_component_eager_create(struct starp
 	(void)arg;
 	struct starpu_sched_component * component = starpu_sched_component_create(tree, "eager");
 	component->push_task = eager_push_task;
-	component->can_push = eager_can_push;
 
 	return component;
 }