deapexer: remove lost+found directory

`deapexer extract` which uses `rdump` command of `debugfs` creates
`lost+found` directory as well. Because the directory is not necessary,
remove it after extraction.

Bug: 159711661
Test: deapexer extract <apex> <dir>
      <dir> should not contain lost+found directory
Merged-In: I77800cb121371b796b940b5792dd16ced41da0fa
Change-Id: I77800cb121371b796b940b5792dd16ced41da0fa
(cherry picked from commit 08c223c40558df86fb401b93f4f8575ae6a9959c)
1 file changed