diff --git a/omnigibson/action_primitives/starter_semantic_action_primitives.py b/omnigibson/action_primitives/starter_semantic_action_primitives.py
index d3def32ae..a0fd65742 100644
--- a/omnigibson/action_primitives/starter_semantic_action_primitives.py
+++ b/omnigibson/action_primitives/starter_semantic_action_primitives.py
@@ -21,7 +21,6 @@
 from omnigibson import object_states
 from omnigibson.action_primitives.action_primitive_set_base import ActionPrimitiveError, ActionPrimitiveErrorGroup, BaseActionPrimitiveSet
 from omnigibson.utils.object_state_utils import sample_cuboid_for_predicate
-from omnigibson.object_states.utils import get_center_extent
 from omnigibson.objects.object_base import BaseObject
 from omnigibson.robots import BaseRobot
 from omnigibson.tasks.behavior_task import BehaviorTask
@@ -1713,7 +1712,7 @@ def _sample_position_on_aabb_face(target_obj):
         Returns:
             3-array: (x,y,z) Position in the world frame
         """
-        aabb_center, aabb_extent = get_center_extent(target_obj.states)
+        aabb_center, aabb_extent = target_obj.aabb_center, target_obj.aabb_extent
         # We want to sample only from the side-facing faces.
         face_normal_axis = random.choice([0, 1])
         face_normal_direction = random.choice([-1, 1])
diff --git a/omnigibson/object_states/utils.py b/omnigibson/object_states/utils.py
deleted file mode 100644
index 730cf42bd..000000000
--- a/omnigibson/object_states/utils.py
+++ /dev/null
@@ -1,16 +0,0 @@
-import numpy as np
-from omnigibson.object_states.aabb import AABB
-
-def get_center_extent(obj_states):
-    assert AABB in obj_states
-    aabb = obj_states[AABB].get_value()
-    center, extent = get_aabb_center(aabb), get_aabb_extent(aabb)
-    return center, extent
-
-def get_aabb_center(aabb):
-    lower, upper = aabb
-    return (np.array(lower) + np.array(upper)) / 2.
-
-def get_aabb_extent(aabb):
-    lower, upper = aabb
-    return np.array(upper) - np.array(lower)
\ No newline at end of file