model.base: replace continue with break in NamespaceSet.remove()

If an item has been found, it doesn't make any sense to continue
iterating the remaining items. Thus, this `continue` is replaced by a
`break`, to break out of the loop once an item has been found.

basyx/aas/model/base.py

@@ -1879,7 +1879,7 @@ def remove(self, item: _NSO) -> None:
             item_in_dict = backend[self._get_attribute(item, attr_name, case_sensitive)]
             if item_in_dict is item:
                 item_found = True
-                continue
+                break
         if not item_found:
             raise KeyError("Object not found in NamespaceDict")
         item.parent = None