remove splitted
Squashed 'system/database/' content from commit 61cc160

git-subtree-dir: system/database
git-subtree-split: 61cc160ef3c175d06c066c75a496d1fbb7a53256
Merge commit '396a0ec6662e25901f1cf807f38c7f9a67a59543' as 'system/database'