message: build: remove local rebase-pr script
  Remove the local rebase-pr script with a deprecation message
  informing the user to instead perform rebases via ng-dev
  PR Close
diff: #!/usr/bin/env bash
  -set -u -e -o pipefail
  +# TODO: Remove this deprecation warning after a reasonable period.
  -BASEDIR=$(dirname "$0")
  -
  -if [ $# -eq 0 ]; then
  - echo "Rebase github PR onto a branch"
  - echo
  - echo "$0 branch_to_rebase_on PR_NUMBER"
  - echo
  - exit 0
  -fi
  -
  -REBASE_ON="$1"
  -PR_NO="$2"
  -
  -
  -HEAD_LABEL=`curl -s https://api.github.com/repos/angular/angular/pulls/$PR_NO | node $BASEDIR/utils/json_extract.js head.label`
  -echo $HEAD_LABEL
  -IFS=':' read -r -a array <<< "$HEAD_LABEL"
  -USER="${array[0]}"
  -USER_GIT_URL="git@github.com:$USER/angular.git"
  -BRANCH="${array[1]}"
  -OLD_BRANCH=`git branch | grep \* | cut -d ' ' -f2`
  -
  -echo =====================================================
  -echo Rebasing $USER_GIT_URL branch $BRANCH onto $REBASE_ON
  -echo =====================================================
  -
  -git fetch $USER_GIT_URL $BRANCH
  -git checkout FETCH_HEAD
  -PUSH_CMD="git push $USER_GIT_URL HEAD:$BRANCH -f";
  -RESTORE_CMD="git checkout $OLD_BRANCH"
  -git rebase upstream/master
  -if [ $? -eq 0 ]; then
  - $PUSH_CMD
  - $RESTORE_CMD
  -else
  - echo ===========================
  - echo Git rebase failed. RECOVER WITH:
  - echo " $PUSH_CMD"
  - echo " $RESTORE_CMD"
  - echo ===========================
  -fi
  +echo "The rebase script has been replaced by the rebase script provided in ng-dev";
  +echo "To run the rebase via ng-dev run the following command:"
  +echo " $ yarn -s ng-dev pr rebase <pr-number>"
  