Revert "SetZoom update the method to calculate the trans"

[hannesa2]

This reverts commit bc7b506.

[hannesa2]

close #507

[hannesa2]

As expected the zoom is now different (thanks to #513 the CI do a verification)

@SimFG it reverts your pull request #329 and handles #507 and #506
To be honest, I don't know if I should revert it or not. What do you think @SimFG and @bartek-wesolowski ?

I'm open to any solution.

[hannesa2]

close #506

[hannesa2]

And it founds more differences https://github.com/MikeOrtiz/TouchImageView/suites/10513010901/artifacts/522001897
I think the screenshot comparison mechanism is not perfect and the init status is confusing too

[bartek-wesolowski]

I think reverting the commit is the right thing to do. The current formula is incorrect. If we want to block panning of smaller images if their containing view is bigger then we should probably adjust getFixTrans() instead of setZoom().