diff --git a/placement/exception.py b/placement/exception.py
index 7f7c8c2ae..b5901ff90 100644
--- a/placement/exception.py
+++ b/placement/exception.py
@@ -112,8 +112,6 @@ class InvalidInventoryCapacityReservedCanBeTotal(InvalidInventoryCapacity):
 # An exception with this name is used on both sides of the placement/
 # nova interaction.
 class InventoryInUse(InvalidInventory):
-    # NOTE(mriedem): This message cannot change without impacting the
-    # nova.scheduler.client.report._RE_INV_IN_USE regex.
     msg_fmt = _("Inventory for '%(resource_classes)s' on "
                 "resource provider '%(resource_provider)s' in use.")
 
diff --git a/placement/handlers/inventory.py b/placement/handlers/inventory.py
index a2a85d5a4..21cf3db16 100644
--- a/placement/handlers/inventory.py
+++ b/placement/handlers/inventory.py
@@ -402,8 +402,6 @@ def delete_inventories(req):
               % {'rp_uuid': resource_provider.uuid},
               comment=errors.CONCURRENT_UPDATE)
     except exception.InventoryInUse as ex:
-        # NOTE(mriedem): This message cannot change without impacting the
-        # nova.scheduler.client.report._RE_INV_IN_USE regex.
         raise webob.exc.HTTPConflict(ex.format_message(),
                                      comment=errors.INVENTORY_INUSE)