Remove RPC from main distribution (#925)

experiment/Discord.Net.Rpc/API/Rpc/GetChannelsResponse.cs

@@ -0,0 +1,12 @@
+#pragma warning disable CS1591
+using Newtonsoft.Json;
+using System.Collections.Generic;
+
+namespace Discord.API.Rpc
+{
+    internal class GetChannelsResponse
+    {
+        [JsonProperty("channels")]
+        public IReadOnlyCollection<ChannelSummary> Channels { get; set; }
+    }
+}