Revert "Enable setting security contexts on rootfs inodes."

This reverts commit b1ef0aae695ca7bfe5f92f0674a085179d592403.
Revert "selinux: call WARN_ONCE() instead of calling audit_log_start()"

This reverts commit a4f9ef44ce771ea5ef982162280ecb5c8f9cbcf5.
Revert "SELinux: Fix kernel BUG on empty security contexts."

This reverts commit 4b56c2407e7a0db252bfe61e21fcc8683ae5bd9f.
Revert "SELinux: Fix memory leak upon loading policy"

This reverts commit 386223b3c5c0862852ad978b928b370ec29d3f58.
Revert "SELinux: Fix possible NULL pointer dereference in selinux_inode_permission()"

This reverts commit 1e7e58911279014b08732e20847ba2783871f58f.
Revert "SELinux: reduce overhead of mls_level_isvalid() function call"

This reverts commit 12ceb969c8d6410ef69c6715c347655786320b7e.
full disable of sr