fix: remove unknown linters:
When running in CI, I obtained the following error:
```
Running [/home/runner/golangci-lint-1.41.0-linux-amd64/golangci-lint run --out-format=github-actions --new-from-patch=/tmp/tmp-1795-28vaWZek2jfM/pull.patch --new=false --new-from-rev=] in [] ...
level=error msg="Running error: unknown linters: 'ireturn,maintidx', run 'golangci-lint linters' to see the list of supported linters"
```
@@ -23,13 +23,11 @@ linters:
- exhaustivestruct
- tagliatelle
- godox
- - ireturn
# We should strive to enable these:
- wrapcheck
- dupl
- makezero
- - maintidx
# We might want to enable this, but it might be a lot of work
- cyclop
