docs: update release docs for go mod switch

License: MIT
Signed-off-by: Steven Allen <steven@stebalien.com>

docs/releases.md

@@ -11,8 +11,6 @@ will be allowed up to release day.
   - use `./bin/mkreleaselog` to generate a nice starter list
 - [ ] version string in `version.go` has been updated
 - [ ] tag commit with vX.Y.Z-rcN
-- [ ] publish gx version with `gx publish`, as per [gx release guidelines](https://github.com/whyrusleeping/gx#publishing-and-releasing)
-  - you will have to manually adjust the gx version to 'rc'
 
 ## Pre-Release Checklist
 - [ ] before release, tag 'release candidate' for users to test against
@@ -23,7 +21,6 @@ will be allowed up to release day.
 - [ ] CHANGELOG.md has been updated
   - use `./bin/mkreleaselog` to generate a nice starter list
 - [ ] version string in `repo/version.go` has been updated
-- [ ] publish gx version with `gx release`, as per [gx release guidelines](https://github.com/whyrusleeping/gx#publishing-and-releasing)
 - [ ] tag commit with vX.Y.Z
 - [ ] update release branch to point to release commit (`git merge vX.Y.Z`).
 - [ ] publish dist.ipfs.io