Remove RPC from main distribution (#925)

experiment/Discord.Net.Rpc/Entities/VoiceModeProperties.cs

@@ -0,0 +1,11 @@
+namespace Discord.Rpc
+{
+    public class VoiceModeProperties
+    {
+        public Optional<string> Type { get; set; }
+        public Optional<bool> AutoThreshold { get; set; }
+        public Optional<float> Threshold { get; set; }
+        public Optional<VoiceShortcut[]> Shortcut { get; set; }
+        public Optional<float> Delay { get; set; }
+    }
+}