Revert "base: add support for tagged fd closure to unique_fd."

This reverts commit fcf2c01b5599a96b968afb1528c996d9486937b0.

Commit broke full-eng, because libbase is being compiled against the NDK.

Test: treehugger
Change-Id: I8447b6a7fc33e6aa34cec0f037727322fa824446
3 files changed