Revert "Added 21-capture-in-cobegin.compopts"
Merge pull request #577 from chapel-lang/revert-575-add-savec-to--21-capture-in-cobegin

I added --savec option to this test so I can see the generated code when it fails.

Turns out that it is not necessary - I was able to observe the failure when I compiled this test myself.

Backing it out, to keep things clean.