Fix copy and paste bugs

[alingse]

I was write a linter https://github.com/alingse/copyandpaste that detect the same code in different branch.

this is mostly a copy and paste things.

I search and post the popular repo in the github and run the workflow.

Here is this repo's result log.

Error: /home/runner/work/copyandpaste/copyandpaste/Go-for-DevOps/chapter/16/workflow/internal/service/jobs/register/tokenbucket/tokenbucket.go:61:4: Duplicate case body found for case "false": and case "true": Is it a copy and paste?
Error: /home/runner/work/copyandpaste/copyandpaste/Go-for-DevOps/chapter/8/rollout/lb/client/cli/cli.go:[7](https://github.com/alingse/copyandpaste/actions/runs/7476736381/job/20347830235#step:7:8)0:2: Duplicate case body found for case "removeBackend": and case "addBackend": Is it a copy and paste?

from the code context. I think these two is a bug.

[alingse]

@devigned need help

[devigned]

@johnsiilver please take a look when you have a minute.