remove unnecessary launch of whistle detection in head mover test

Author: val-ba

src/bitbots_motion/bitbots_head_mover/launch/test.launch

@@ -32,9 +32,6 @@
         <arg name="sim" value="$(var sim)"/>
     </include>
 
-    <include file="$(find-pkg-share bitbots_whistle_detector)/launch/whistle_detector.launch">
-    </include>
-
     <group if="$(var viz)">
         <!-- translate joint goals to joint states -->
         <node pkg="bitbots_utils" exec="motor_goals_viz_helper.py" args="--head"/>