Revert "Add experimental config for navigation raf test (#62668)" (#62834)
Reverting this experimental flag as it should not be used and we are
going to investigate experimenting with this further upstream so that it
can be done properly.
This reverts commit 2bdcaa0fda09faccbb70c454ef52f2302f84acb2.
x-ref: https://github.com/vercel/next.js/pull/62668
Closes NEXT-2689