Revert "File{Input,Output}Stream: catch ownership misassignment on construction."

This reverts commit 3b16bb1b62c84decca23b0922aa9bef4b9575a9d.

Reason for revert: This is causing crashes in backup and restore and causing presubmit tests to fail.

Bug: 159264419
Change-Id: I5703642c7e7d444005a3024cf9ec61bd714ad5ce
2 files changed