Disable Discord URI registration on macOS for now

[smoogipoo]

2024-04-04 00:29:57 [error]: An unhandled error has occurred.
2024-04-04 00:29:57 [error]: System.IO.IOException: Read-only file system : '/~'
2024-04-04 00:29:57 [error]: at System.IO.FileSystem.CreateParentsAndDirectory(String fullPath, UnixFileMode unixCreateMode)
2024-04-04 00:29:57 [error]: at System.IO.FileSystem.CreateDirectory(String fullPath, UnixFileMode unixCreateMode)
2024-04-04 00:29:57 [error]: at System.IO.Directory.CreateDirectory(String path)
2024-04-04 00:29:57 [error]: at DiscordRPC.Registry.MacUriSchemeCreator.RegisterUriScheme(UriSchemeRegister register)
2024-04-04 00:29:57 [error]: at DiscordRPC.Registry.UriSchemeRegister.RegisterUriScheme()
2024-04-04 00:29:57 [error]: at DiscordRPC.DiscordRpcClient.RegisterUriScheme(String steamAppID, String executable)
2024-04-04 00:29:57 [error]: at osu.Desktop.DiscordRichPresence.load(OsuConfigManager config) in /Users/smgi/Repos/osu/osu.Desktop/DiscordRichPresence.cs:line 81

It's trying to create the directory ~/Library/Application Support/discord/games, but since .app bundles are run in Apple's sandbox, they can't just randomly touch the user's home directory. Disabling this for now - issue appears to be known? in the library but has been untouched for the good part of 2+ years.

[peppy]

Glad you caught this before a release...

[smoogipoo]

I noticed it during the osu-deploy testing earlier today. It's not fatal - just causes a notification every startup, hence why I forgot about it >_>

[peppy]

It would have broken random shit – the bindable code following it.