Reverts "Skips head pose querying due to pinocchio version issue" (#353)

Reverts isaac-sim/IsaacLab-Internal#344

source/isaaclab/isaaclab/devices/openxr/openxr_device.py

@@ -225,10 +225,6 @@ class OpenXRDevice(DeviceBase):
         Returns:
             numpy.ndarray: 7-element array containing head position (xyz) and orientation (wxyz)
         """
-
-        """
-        # TODO: This is a temporary fix since get_virtual_world_pose crashes if pinocchio 2.7 is used
-
         head_device = XRCore.get_singleton().get_input_device("displayDevice")
         if head_device:
             hmd = head_device.get_virtual_world_pose("")
@@ -247,7 +243,6 @@ class OpenXRDevice(DeviceBase):
                 quati[1],
                 quati[2],
             ])
-        """
 
         return self._previous_headpose