Release-tool exists in a separate repo

.travis.yml

@@ -2,17 +2,14 @@ language: go
 sudo: required
 
 go:
-  - 1.11.x
+  - 1.13.x
 
 go_import_path: github.com/containerd/project
 
 install:
   - go get -u github.com/vbatts/git-validation
   - go get -u github.com/kunalkushwaha/ltag
-  - go get -u github.com/LK4D4/vndr
 
 script:
   - DCO_VERBOSITY=-q script/validate/dco
   - script/validate/fileheader
-  - test -z $(git diff --name-only HEAD~1 | grep vendor) || script/validate/vendor
-  - test -z $(git diff --name-only HEAD~1 | grep -E 'cmd/release-tool|vendor') || go build -o release-tool github.com/containerd/project/cmd/release-tool

README.md

@@ -5,11 +5,9 @@ the containerd organization.
 
 ## release-tool utility
 
-The `release-tool` utility is maintained here in the common project repo
-to reduce duplication across the various release branches of the main
-`containerd/containerd` repository where it is used to cut release
-notes and project data to aid release engineers. It has the ability
-to be used by other projects as well.
+The `release-tool` utility, previously maintained here in the common
+project repository, has its own repository now. It is now located in
+the [`release-tool`](https://github.com/containerd/release-tool) repo.
 
 ## Common scripts