Removes xps fitting region in example
While testing in nomad I've seen that the fitting with the provided fit region is off. Therefore, I removed the fit_region entirely which produces a nicer fit.
@rumo Please check the fit quality and approve if you agree. Feel free to merge this if you are happy with this change. Also is there a reason why this changed? Did you change the reading of axis and do we expect a shift here?
Edited by Florian Dobener