chore: remove .gx

Author: marten-seemann

.gx/lastpubver

@@ -30,14 +30,10 @@ The protocol is defined [here](https://github.com/multiformats/multistream-selec
 go get github.com/multiformats/go-multistream
 ```
 
-Note that `go-multistream` is packaged with Gx, so it is recommended to use Gx to install and use it (see Usage section).
-
-
 ## Usage
 
 ### Example
 
-
 This example shows how to use a multistream muxer. A muxer uses user-added handlers to handle different "protocols". The first step when interacting with a connection handler by the muxer is to select the protocol (the example uses `SelectProtoOrFail`). This will then let the muxer use the right handler.