extraneous data in some outputs

[coolaj86]

I found this on a dev instance:

    {
        "name": "node-v20.8.1-darwin-arm64.tar.gz",
        "version": "20.8.1",
        "lts": false,
        "channel": "stable",
        "date": "2023-10-13",
        "os": "macos",
        "arch": "arm64",
        "ext": "tar.gz",
        "download": "https://nodejs.org/download/release/v20.8.1/node-v20.8.1-darwin-arm64.tar.gz",
        "oses": [
            "aix",
            "linux",
            "macos",
            "windows"
        ],
        "arches": [
            "ppc64",
            "arm64",
            "armv7l",
            "ppc64le",
            "s390x",
            "amd64",
            "x86",
            "armv6l"
        ],
        "formats": [
            "pkg",
            "zip",
            "msi"
        ]
    }

Notice the extra oses, arches, etc.

I think it comes from here:

webi-installers/_webi/serve-installer.js

Lines 78 to 80 in 3501e89

	rel.oses = rels.oses;
	rel.arches = rels.arches;
	rel.formats = rels.formats;

It may have been meant for the test suite.

This other file looks correct:

webi-installers/_webi/normalize.js

Lines 147 to 155 in 3501e89

	all.oses = Object.keys(supported.oses).filter(function (name) {
	return maps.oses[name];
	});
	all.arches = Object.keys(supported.arches).filter(function (name) {
	return maps.arches[name];
	});
	all.formats = Object.keys(supported.formats).filter(function (name) {
	return maps.formats[name];
	});

[coolaj86]

I found the reason for this. I believe it was already fixed in fc36f3e.

If not, #756 will certainly zap it!