Remove database split code
Squashed 'src/Chinook/Database/' content from commit ac97b02

git-subtree-dir: src/Chinook/Database
git-subtree-split: ac97b025fb8494d856e42d211dad8343a642e37c
Merge commit '2ce0639e25d7352f76cc188834cdbe57d5001fc2' as 'src/Chinook/Database'