Revert "Check if in uninstalled app dirs are mounted files"

Revert "Check if in uninstalled app dirs are mounted files"

This reverts commit ea66fe10d96114efdf2f661f9ab363136a57ed9e.

Original commit is for preventing uninstallation before unmount of the mounted point for current target pkg. (actual case : run external installed pkg)
But, We should be able to uninstall pkg regaredless of mount state.
So, New patch should be considered to actually unmount the point in the unistall progress.

Note: there, in the platform, is another chance to unmount all mounted points for external pkg when sdcard is removed.

Change-Id: I013b0bfb4734ec92549de840faa516ddbbf6b783