[clang-format] Don't eat two semicolons after namespace

[HazardyKnusperkeks]

Summary

Remove the double check, move the comment.

This changes behavior, but I think for the better. Despite the comment my personal opinion would be to not even gracefully handle the one semicolon, it shouldn't be there.

[HazardyKnusperkeks]

Ping

[MyDeveloperDay]

Feels like this would only show if someone did

namespace A {
};;

Which seems odd

[MyDeveloperDay]

clang/lib/Format/UnwrappedLineParser.cpp

2999

This comment was wrong I guess, because of /*MunchSemi=*/true