Unflip motors

We're going to deal with them all in software here now, and not
per-motor controller configuration.

Change-Id: I25894da843e0a168fe9e92483ceebf5ef7e368e6
diff --git a/motors/simpler_receiver.cc b/motors/simpler_receiver.cc
index b3e5a36..86539bd 100644
--- a/motors/simpler_receiver.cc
+++ b/motors/simpler_receiver.cc
@@ -394,8 +394,8 @@
     vesc_set_duty(0, -output.left_voltage / 12.0f);
     vesc_set_duty(1, -output.left_voltage / 12.0f);
 
-    vesc_set_duty(2, -output.right_voltage / 12.0f);
-    vesc_set_duty(3, -output.right_voltage / 12.0f);
+    vesc_set_duty(2, output.right_voltage / 12.0f);
+    vesc_set_duty(3, output.right_voltage / 12.0f);
   }
 }