No, it is not possible to delete a record from a Datatable using a Savable Data Page. Savable Data Pages are intended to update or create new records in the database, but not to delete them. To delete a record, you should use a dedicated activity or a data transform that removes the record from the corresponding table in the database.
A sample code snippet for deleting a record from a datatable in Pega.
// Create a new instance of the DataTable class
DataTable myDataTable = new DataTable();
// Set the DataTable to be savable
myDataTable.setSavable(true);
// Set the name of the datatable
myDataTable.setName("myDataTable");
// Get the row to be deleted
DataRow rowToDelete = myDataTable.getRow("rowId");
// Delete the row
myDataTable.deleteRow(rowToDelete);
// Commit the changes
myDataTable.save();