Revert "Add OWNERS."

This reverts commit 58009979690a98f6cd3c0e545498ba90e4cc9871.

It doesn't make sense to have a giant OWNERS file that applies to all
of the directories in this repository.

Bug: http://b/70201085
Change-Id: I8ad03e6ae6f0a58bdb7499e359eaf61e9869cb39
Exempted-From-Owner-Approval: this OWNERS file never should have existed
Test: none
1 file changed