Unexported fields are skipped during marshalling, so this would be a
nop.
The code in `./cmd/sync/github*.go` is currently unused.
Confirmed that staticcheck passes when run with:
```
staticcheck -checks SA9005 ./...
```
Functionality from `io/ioutil` has moved to the `io` and `os` packages
in go1.16 ([reference](https://pkg.go.dev/io/ioutil)).
Confirmed that staticcheck passes when run with:
```
staticcheck -checks SA1019 ./...
```