Revert "Allow callers of uevent_kernel_*() access to /proc/sys/kernel/overflowuid"

This reverts commit 640e595a68713d6d09eab4c436780498c46cdbcb. The
corresponding code in libcutils was removed, so this is now unneeded.

Bug: 71632076
Test: aosp_sailfish still works

Change-Id: I615bab83e9a83bc14439b8ab90c00d3156b0a7c4
9 files changed