window: Remove broken check
The disable_rename_playlist is not a function of PlaylistsView, resulting in a crash. There is no actual harm in not disabling the renaming, so remove the check completely.
Partial backport of !588 (merged)
The disable_rename_playlist is not a function of PlaylistsView, resulting in a crash. There is no actual harm in not disabling the renaming, so remove the check completely.
Partial backport of !588 (merged)