remove note about gx from README

README.md

@@ -19,7 +19,6 @@
   - [Examples](#examples)
 - [Development](#development)
   - [Using the go-libp2p Workspace](#using-the-go-libp2p-workspace)
-  - [About gx](#about-gx)
   - [Tests](#tests)
   - [Packages](#packages)
 - [Contribute](#contribute)
@@ -65,18 +64,6 @@ Once you've committed your changes, you can switch back to "remote mode", which
 
 See the [workspace repo](https://github.com/libp2p/workspace-go-libp2p) for more information.
 
-### About gx
-
-Before adopting gomod, libp2p used [gx](https://github.com/whyrusleeping/gx) to manage dependencies using [IPFS](https://ipfs.io).
-
-Due to the difficulties in keeping both dependency management solutions up-to-date, gx support was ended in April 2019.
-
-Ending gx support does not mean that existing gx builds will break. Because gx references dependencies by their immutable IPFS hash, any currently working gx builds will continue to work for as long as the dependencies are resolvable in IPFS.
-
-However, new changes to go-libp2p will not be published via gx, and users are encouraged to adopt gomod to stay up-to-date.
-
-If you experience any issues migrating from gx to gomod, please [join the discussion at the libp2p forums](https://discuss.libp2p.io/t/gomod-and-go-libp2p/44).
-
 ### Tests
 
 `go test ./...` will run all tests in the repo.
@@ -164,7 +151,3 @@ There's a few things you can do right now to help out:
  - Go through the modules below and **check out existing issues**. This would be especially useful for modules in active development. Some knowledge of IPFS/libp2p may be required, as well as the infrasture behind it - for instance, you may need to read up on p2p and more complex operations like muxing to be able to help technically.
  - **Perform code reviews**.
  - **Add tests**. There can never be enough tests.
-
----
-
-The last gx published version of this module was: 6.0.41: QmTRN7hRxvGkxKxDdeudty7sRet4L7ZKZCqKsXHa79wmAc