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

@@ -1884,7 +1884,7 @@ 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