uncomment covar matrix param in launchfile

hand_control/launch/ardrone.launch

@@ -35,11 +35,9 @@
       <param name="do_imu_caliberation" value="false" />
       <param name="tf_prefix" value="mydrone" />
       <!-- Covariance Values (3x3 matrices reshaped to 1x9)-->
-      <!--
       <rosparam param="cov/imu_la">[0.1, 0.0, 0.0, 0.0, 0.1, 0.0, 0.0, 0.0, 0.1]</rosparam>
       <rosparam param="cov/imu_av">[1.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 1.0]</rosparam>
       <rosparam param="cov/imu_or">[1.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 100000.0]</rosparam>
-      -->
   </node>
 </launch>