Remove unused Cleanup() call

It was used to clean up shared memory.  We don't construct that anymore,
so remove the useless call.

Change-Id: I8087cef2afce184f66721a9995a63053fb278ec7
diff --git a/y2020/actors/autonomous_actor_main.cc b/y2020/actors/autonomous_actor_main.cc
index 99563ee..b242e05 100644
--- a/y2020/actors/autonomous_actor_main.cc
+++ b/y2020/actors/autonomous_actor_main.cc
@@ -15,6 +15,5 @@
 
   event_loop.Run();
 
-  ::aos::Cleanup();
   return 0;
 }
diff --git a/y2020/control_loops/drivetrain/drivetrain_main.cc b/y2020/control_loops/drivetrain/drivetrain_main.cc
index 7804814..38a1b0d 100644
--- a/y2020/control_loops/drivetrain/drivetrain_main.cc
+++ b/y2020/control_loops/drivetrain/drivetrain_main.cc
@@ -22,6 +22,5 @@
 
   event_loop.Run();
 
-  ::aos::Cleanup();
   return 0;
 }
diff --git a/y2020/control_loops/drivetrain/drivetrain_replay.cc b/y2020/control_loops/drivetrain/drivetrain_replay.cc
index faf2cef..5a97943 100644
--- a/y2020/control_loops/drivetrain/drivetrain_replay.cc
+++ b/y2020/control_loops/drivetrain/drivetrain_replay.cc
@@ -65,6 +65,5 @@
 
   reader.event_loop_factory()->Run();
 
-  aos::Cleanup();
   return 0;
 }
diff --git a/y2020/control_loops/superstructure/superstructure_main.cc b/y2020/control_loops/superstructure/superstructure_main.cc
index aa74d56..c0ac956 100644
--- a/y2020/control_loops/superstructure/superstructure_main.cc
+++ b/y2020/control_loops/superstructure/superstructure_main.cc
@@ -15,6 +15,5 @@
 
   event_loop.Run();
 
-  ::aos::Cleanup();
   return 0;
 }
diff --git a/y2020/joystick_reader.cc b/y2020/joystick_reader.cc
index 2049e83..5825475 100644
--- a/y2020/joystick_reader.cc
+++ b/y2020/joystick_reader.cc
@@ -196,5 +196,5 @@
 
   event_loop.Run();
 
-  ::aos::Cleanup();
+  return 0;
 }
diff --git a/y2020/setpoint_setter.cc b/y2020/setpoint_setter.cc
index 1cbc518..f4aa03a 100644
--- a/y2020/setpoint_setter.cc
+++ b/y2020/setpoint_setter.cc
@@ -30,5 +30,5 @@
   setpoint_builder.add_hood(FLAGS_hood);
   builder.Send(setpoint_builder.Finish());
 
-  aos::Cleanup();
+  return 0;
 }