Revert "ext4: fix use-after-free in ext4_rename_dir_prepare"

This reverts commit 10801095 which is
commit 0be698ecbe4471fcad80e81ec6a05001421041b3 upstream as it breaks
the build in Android kernel builds due to out-of-tree changes that were
never merged upstream.

Bug: 236690716
Fixes: bc1a5b8c02ae ("Merge 4.14.283 into android-4.14-stable")
Cc: Daniel Rosenberg <drosen@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I511f362fecb21bdc53fb3a93bb9772be96e7f985