IListener and IRadio purge (#11980)

Content.Server/Radio/Components/IntrinsicRadioTransmitterComponent.cs

@@ -0,0 +1,15 @@
+using Content.Shared.Radio;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype.Set;
+
+namespace Content.Server.Radio.Components;
+
+/// <summary>
+///     This component allows an entity to directly translate spoken text into radio messages (effectively an intrinsic
+///     radio headset).
+/// </summary>
+[RegisterComponent]
+public sealed class IntrinsicRadioTransmitterComponent : Component
+{
+    [DataField("channels", customTypeSerializer: typeof(PrototypeIdHashSetSerializer<RadioChannelPrototype>))]
+    public readonly HashSet<string> Channels = new() { "Common" };
+}