Remove incorrect (and unused) capget code.

Note that if you revert this change, the code it removes is incorrect,
and doesn't handle the top 32 bits of capabilities, one of which we're
already using: CAP_BLOCK_SUSPEND.

Bug: 11508244
Change-Id: Ice1f51334bce4941c6d24d6016450a2ebcf92886
Merge "Remove incorrect (and unused) capget code."