gitignore: remove invalid entires

.gitignore

@@ -14,16 +14,6 @@
 /etc/skel/*
 !/etc/skel/.bashrc
 
-# /etc/zio/backup/
-!/etc/zio/backup/
-/etc/zio/backup/*
-!/etc/zio/backup/.gitkeep
-
-# /root/
-!/root/
-/root/*
-!/root/.bashrc
-
 # /usr/
 !/usr/
 /usr/*
@@ -38,23 +28,3 @@
 !/usr/local/bin/update-rootfs
 !/usr/local/bin/zio-backup
 
-# /usr/local/sbin/
-!/usr/local/sbin/
-/usr/local/sbin/*
-!/usr/local/sbin/update-rootfs
-!/usr/local/sbin/zio-backup
-
-# /var/
-!/var/
-/var/*
-
-# /var/lib/
-!/var/lib/
-/var/lib/*
-
-# /var/lib/zio-backup/
-!/var/lib/zio-backup/
-/var/lib/zio-backup/*
-!/var/lib/zio-backup/*.*
-!/var/lib/zio-backup/passwd
-/var/lib/zio-backup/*.*~