Revert "Add SELinux filesystem relabeling to init"

This reverts commit d2d1a7ff.

Revert "selinuxrelabel: Remove attempts to relabel /system"

This reverts commit cae5f245.

Revert "Recheck /data for selinux labeling"

This reverts commit c4dcb16c.

Revert "selinuxrelabel: Add a check for dalvik-cache"

This reverts commit c7e92306.

Revert "selinuxrelabel: Need to check in priv-app now"

This reverts commit 3013c99a.

Revert "selinux: When adding userdata labels, do cache too"

This reverts commit 8994907b.

Revert "selinux: Use a more reliable sentinel to flag /data labelling"

This reverts commit b52874de.

Change-Id: I7779aaca3b0751ed74d525292681817182a0aa7f