also drop ar-track-alvar due to issue #397

recipes-ros/packagegroups/packagegroup-ros-world.bb

@@ -160,7 +160,6 @@ RDEPENDS_${PN} = "\
     velodyne-driver \
     velodyne-msgs \
     velodyne-pointcloud \
-    ar-track-alvar \
     razor-imu-9dof \
     xv-11-laser-driver \
     ros-arduino-firmware \
@@ -175,6 +174,7 @@ RDEPENDS_${PN} = "\
     rosbridge-suite \
     "
 
+# ar-track-alvar does not compile due to unknown opencv identifiers.
 # image-view requires gtk+, but it cannot be found by cmake for some reason.
 # sound-play requires python-gst (which is not available in any layers' master branch)
 # joint-state-publisher still has some issues.