ext4: delete useless comments about ext4_move_extents
ext4: delete useless comments about ext4_move_extents

In patch 'ext4: refactor ext4_move_extents code base',  Dmitry Monakhov has
refactored ext4_move_extents' implementation, but forgot to update the
corresponding comments, this patch will try to delete some useless comments.

Reviewed-by: Dmitry Monakhov <eecfa5af1016ca9db755569d9919e212ab6a1c94@openvz.org>
Signed-off-by: Xiaoguang Wang <cd191211253f6bdd87551d94afa5fd6260914732@cn.fujitsu.com>
Signed-off-by: Theodore Ts'o <4ed386e0495d3e109932df055831d9ec2f824927@mit.edu>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs