update stream comments

stream/proto/stream.proto

@@ -33,8 +33,7 @@ message Channel {
 	string last_active = 3;
 }
 
-// Create a channel with a given name and description. Channels are created automatically but 
-// this allows you to specify a description that's persisted for the lifetime of the channel.
+// Create a channel by name
 message CreateChannelRequest {
 	// name of the channel
 	string name = 1;