message: Fix Travis build failure.
diff: @@ -117,6 +117,9 @@ jobs:
  os: linux
  dist: focal
  install:
  + - # As of 2021-08-23, the server listed in the rabbitmq PPA has an expired certificate
  + - # and breaks our ability to update. We don't need it, so remove it.
  + - sudo rm /etc/apt/sources.list.d/rabbitmq.list
  - sudo apt-get update
  - sudo apt-get install unzip zip awscli httpie
  - chmod +x "./travis/travis-get-ue.sh"
  @@ -147,6 +150,9 @@ jobs:
  git:
  submodules: false
  install:
  + - # As of 2021-08-23, the server listed in the rabbitmq PPA has an expired certificate
  + - # and breaks our ability to update. We don't need it, so remove it.
  + - sudo rm /etc/apt/sources.list.d/rabbitmq.list
  - sudo apt-get update
  - sudo apt-get install unzip zip awscli httpie
  script:
  