Remove scroll into view when clicking MR "Changes" tab
We should remove the forced scrollTo when switching to the "Changes"/diff tab on a MR.
Aside from it being a slightly annoying personally, we don't force the scroll for any of the other tabs even though "Pipelines" and "Commits" also have loading indicators.
See original issue that introduced the change https://gitlab.com/gitlab-org/gitlab-ce/issues/15133
