hello-world: remove the reference to `UnsupportedOperationException` in instructions

[andrerfcsantos]

The instructions for the "Hello World" exercise tell the student to remove an UnsupportedOperationException:

https://github.com/exercism/java/blob/9abbe2a744625d698691249714d992fbdc17662c/exercises/practice/hello-world/.docs/instructions.append.md?plain=1#L52-L59

However, currently neither the tests or the solution contain an exception, so these instructions are not relevant anymore and must be removed to reflect the current stub files provided.

[unfirthman]

Hi @andrerfcsantos

If this issue is still open, I'd love to try to tackle it.

[andrerfcsantos]

@unfirthman Go for it :)

[suraj-mandal]

Hi, is this issue open? I was getting updates of this issue being open, but it is stated that a fix has been merged. Can you close if this issue if the problem has been resolved.

[ShadowZone]

I just solved the exercise and the error is still there. Stated UnsupportedOperationException in text but is not found in initial code block

[andrerfcsantos]

I'll close this issue, as the main goal of fixing the instructions to not use the exception was achieved.

However, it seems there's a reference to the UnsupportedOperationException in the table of contents for the exercise, but I made a separate issue for that #2167

[andrerfcsantos]

The table of contents issue is now fixed by #2166 which was already merged.

@ShadowZone If there are other places where the instructions should be updated that I'm not seeing, please feel free to create a new issue or PR.