There's two main ways to do it:

1. Uncheck the box "Properties" when hovering the copilot button, at the bottom of your screen Check this image

2. Set "properties" to false in the settings.json of your vscode (either global one or the one of your workspace)

    "github.copilot.enable": {
        "*": true,
        "plaintext": false,
        "properties": false
    },