Is it possible to save files without results so as to keep the amount of data?
The figure shows how the file size changes depending on your selection.
To delete the results of an open model, select "Results" -> "Available Results." Then select the relevant entry and click [Delete].
Alternatively, you can right-click the results in the Project Navigator an select "Delete All Results."
Also, you can just shift a node in the model and then [Undo] the action, thus deleting all results.