Allow room category to be copied even if `Spotlight`
Allow room category to be copied even if `Spotlight`

I remember that this conditional copy was added to support making copies
of spotlight rooms without carrying across the `Spotlight` type, but in
testing this is already handled web side to the point that it's not
required.

The rationale for allowing the copy is that this method is used for
tests, where it was not being copied correctly from the input as
expected (used at
https://github.com/ppy/osu/blob/bdc3b76df0b58406796e2b08db13be7f2140fa7e/osu.Game/Tests/Visual/OnlinePlay/TestRoomManager.cs#L38).

NeoAdonis/osu,peppy/osu,ppy/osu,ppy/osu,peppy/osu,peppy/osu,NeoAdonis/osu,ppy/osu,NeoAdonis/osu