Fix return type of DataSet edit dialog method

Author: cdebonnel

guidata/dataset/datatypes.py

@@ -83,7 +83,6 @@
     from qtpy.QtCore import QSize
     from qtpy.QtWidgets import QDialog, QWidget
 
-    from guidata.dataset.qtwidgets import DataSetEditDialog
     from guidata.io import HDF5Reader, HDF5Writer, JSONReader, JSONWriter
 
 
@@ -1375,14 +1374,17 @@ def edit(
         apply: Callable | None = None,
         wordwrap: bool = True,
         size: QSize | tuple[int, int] | None = None,
-    ) -> DataSetEditDialog:
+    ) -> int:
         """Open a dialog box to edit data set
 
         Args:
             parent: parent widget (default is None, meaning no parent)
             apply: apply callback (default is None)
             wordwrap: if True, comment text is wordwrapped
             size: dialog size (QSize object or integer tuple (width, height))
+
+        Returns:
+            Dialog exit code.
         """
         # Importing those modules here avoids Qt dependency when
         # guidata is used without Qt