Investigate why `quarkus-properties` appears twice when registering `textDocument/rangeFormatting`

[xorye]

In the 1.6.0 release (before the vscode-microprofile / vscode-quarkus split), when opening a Quarkus application.properites file,
looking at the server trace, quarkus-properties appears twice in the client/registerCapability request for range formatting;

[Trace - 11:16:26 a.m.] Received request 'client/registerCapability - (8)'.
Params: {
    "registrations": [
        {
            "id": "61e7b5ba-a567-4415-8817-70e18fed36a9",
            "method": "textDocument/rangeFormatting",
            "registerOptions": {
                "documentSelector": [
                    {
                        "language": "microprofile-properties"
                    },
                    {
                        "language": "quarkus-properties"
                    },
                    {
                        "language": "quarkus-properties"
                    }
                ]
            }
        }
    ]
}

It's strange that quarkus-properties appears twice, although I couldn't find any bugs because of this. Range formatting still works as expected.

[datho7561]

This line here in quarkus-ls is likely contributing the extra occurrence of quarkus-properties.