Remove wrappers of removed Bindings API

Sources/XXClient/Callbacks/BroadcastListener.swift

Sources/XXClient/Channel/Channel.swift

Sources/XXClient/Channel/Functions/ChannelBroadcast.swift

...Client/Channel/Functions/ChannelBroadcastAsymmetric.swift

Sources/XXClient/Channel/Functions/ChannelGet.swift

Sources/XXClient/Channel/Functions/ChannelListen.swift

...t/Channel/Functions/ChannelMaxAsymmetricPayloadSize.swift

...es/XXClient/Channel/Functions/ChannelMaxPayloadSize.swift

Sources/XXClient/Channel/Functions/ChannelStop.swift

Sources/XXClient/Functions/NewBroadcastChannel.swift

Sources/XXClient/Models/BroadcastMessage.swift

Sources/XXClient/Models/BroadcastReport.swift

Sources/XXClient/Models/ChannelDef.swift

Tests/XXClientTests/Models/BroadcastMessageTests.swift

Tests/XXClientTests/Models/BroadcastReportTests.swift

Tests/XXClientTests/Models/ChannelDefTests.swift