README.md: remove dead link

Change-Id: I8298edcf5fa8ad52594cdabe1728960a0804cb21
GitHub-Last-Rev: 2814fb4
GitHub-Pull-Request: #11
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/592995
Reviewed-by: Ian Lance Taylor <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>

Author: chai2010

Diff for: README.md

@@ -20,5 +20,3 @@ The master copy of these files is hosted in [Gerrit](http://go.googlesource.com/
 If your organization is the copyright holder, the organization will need to agree to the [Google Software Grant and Corporate Contributor License Agreement](http://code.google.com/legal/corporate-cla-v1.0.html).
 
 If the copyright holder for your code has already completed the agreement in connection with another Google open source project, it does not need to be completed again.
-
-The authors of these files may be found in the [AUTHORS](./AUTHORS) and [CONTRIBUTORS](./CONTRIBUTORS) files.