Failed to uninstall gitlab-runner on macOS ([...] gitlab-runner.plist: no such file or directory)

Summary

I installed gitlab-runner (I realized that [recently?] the name changed to gitlab-ci-multi-runner) on my macOS computer. My initial configuration did not work, and I reckoned I probably just one to use a server in DigitalOcean instead of my computer. I try to uninstall with:

gitlab-runner uninstall

Steps to reproduce

Run gitlab-runner uninstall

Actual behavior

Receive the following error message:

FATAL: Failed to uninstall gitlab-runner: remove /Users/(...)/Library/LaunchAgents/gitlab-runner.plist: no such file or directory

Expected behavior

gitlab-runner is uninstalled.

Environment description

Are you using shared Runners on GitLab.com? Or is it a custom installation? Which executors are used? Please also provide the versions of related tools like docker info if you are using the Docker executor.

My config.toml looks like:

❯ cat config.toml concurrent = 1 check_interval = 0

[[runners]]
  name = "Johnny's Work Computer"
  url = "https://gitlab.com/ci"
  token = "(...)"
  executor = "docker"
  [runners.docker]
    tls_verify = false
    image = "docker:latest"
    privileged = false
    disable_cache = false
    volumes = ["/cache"]
    shm_size = 0
  [runners.cache]

Used GitLab Runner version

Please run and paste the output of gitlab-runner --version. If you are using a Runner where you don't have access to, please paste at least the first lines the from build log, like:
Running with gitlab-ci-multi-runner 1.4.2 (bcc1794)
Using Docker executor with image golang:1.6 ...

❯ gitlab-runner --version
Version:      9.1.0
Git revision: 0118d89
Git branch:   9-1-stable
GO version:   go1.7.5
Built:        Fri, 21 Apr 2017 14:32:12 +0000
OS/Arch:      darwin/amd64