Remove all references to anon_inodefs_t
    
    Since kernel commit 3836a03d978e ("anon_inodes: mark the anon inode
    private") - i.e. for over 10 years ago (!) - anon_inodefs inodes are no
    longer exposed to LSMs so all rules containing reference to the
    anon_inodefs_t type were removed from selinux-policy.