remove manual build steps

(cherry picked from commit 18a9e6b)

Author: Matthew Fisher

docs/contributing/release-checklist.md

@@ -207,25 +207,9 @@ git tag $RELEASE_NAME-rc1
 git push upstream $RELEASE_NAME-rc1
 ```
 
-~~Jenkins will automatically create a tagged release image and client binary to test with.~~
+CircleCI will automatically create a tagged release image and client binary to test with.
 
-At the present time, [Jenkins does not support](https://issues.jenkins-ci.org/browse/JENKINS-34395)
-building releases from tags, so it is up to the release maintainer to create the release candidate
-binaries themselves and upload the docker image to DockerHub. This can be done by running
-
-```
-make clean
-make bootstrap
-make build-cross
-VERSION=$RELEASE_NAME-rc1 make dist checksum
-DOCKER_REGISTRY=docker.io IMAGE_PREFIX=microsoft VERSION=$RELEASE_NAME-rc1 make docker-binary docker-build docker-push
-```
-
-Afterwards, the release maintainer will need to upload the binaries and checksums to Azure Blob
-Storage. If the release maintainer does not have access to the container, PM @bacongobbler for
-more information.
-
-For testers, the process to start testing after Jenkins finishes building the artifacts involves
+For testers, the process to start testing after CircleCI finishes building the artifacts involves
 the following steps to grab the client from Azure Blob Storage:
 
 linux/amd64, using /bin/bash: