docs(readme): remove reference to gx

README.md

@@ -34,36 +34,16 @@ It is used in `go-ipfs` and related packages to refer to a typed hunk of data.
 go get github.com/ipfs/go-cid
 ```
 
-Note that `go-cid` is packaged with Gx, so it is recommended to use Gx to install and use it (see Usage section).
-
 ## Usage
 
-### Using Gx and Gx-go
-
-This module is packaged with [Gx](https://github.com/whyrusleeping/gx). In order to use it in your own project it is recommended that you:
-
-```sh
-go get -u github.com/whyrusleeping/gx
-go get -u github.com/whyrusleeping/gx-go
-cd <your-project-repository>
-gx init
-gx import github.com/ipfs/go-cid
-gx install --global
-gx-go --rewrite
-```
-
-Please check [Gx](https://github.com/whyrusleeping/gx) and [Gx-go](https://github.com/whyrusleeping/gx-go) documentation for more information.
-
 ### Running tests
 
-Before running tests, please run:
+Run tests with `go test` from the directory root
 
 ```sh
-make deps
+go test
 ```
 
-This will make sure that dependencies are rewritten to known working versions.
-
 ### Examples
 
 #### Parsing string input from users