Revert "Laravel Scout support (#4032)" + Update supported package version

[joelharkes]

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Filling out the template is required. Any pull request that does not include enough information to be reviewed in a timely manner may be closed at the maintainers' discretion.

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[patrickbrouwers]

I have been using 3.1.51 without having Laravel Scout installed, without any problems. I don't see a reason for reverting.
Also, I don't want to drop older versions of PHP/Laravel for the time being. This is also something I would never merge with in another PR.