AC_PosControl: remove completed to-do comments

libraries/AC_AttitudeControl/AC_PosControl.cpp

@@ -393,11 +393,8 @@ void AC_PosControl::accel_to_throttle(float accel_target_z)
     // get d term
     d = _pid_alt_accel.get_d(_accel_error.z, _dt);
 
-    // To-Do: pull min/max throttle from motors
-    // To-Do: we had a contraint here but it's now removed, is this ok?  with the motors library handle it ok?
+    // send throttle to attitude controller with angle boost
     _attitude_control.set_throttle_out((int16_t)p+i+d+_throttle_hover, true);
-    
-    // to-do add back in PID logging?
 }
 
 ///