Updated

Scripts/Modeling/Edit/LDMT/ldmt_deleteNamespace.py

@@ -0,0 +1,26 @@
+import maya.cmds as cmds
+def remove_namespaces(node):
+
+    try:
+        # Note rsplit instead of split
+
+        namespace, name = node.rsplit(":", 1)
+    except:
+        namespace, name = None, node
+
+    if namespace:
+        try:
+            cmds.rename(node, name)
+        except RuntimeError:
+            # Can't remove namespaces from read-only nodes
+            # E.g. namespaces embedded in references
+            pass
+
+def deleteNamespace():
+    for node in cmds.ls(sl=1):
+        # Remove namespaces of all children first
+        for descendent in cmds.listRelatives(node, allDescendents=True):
+            remove_namespaces(descendent)
+
+        # Finally, remove namespace from current selection
+        remove_namespaces(node)