Revert of Update re2

third_party/re2/CONTRIBUTORS

 # This is the official list of people who can contribute
 # (and typically have contributed) code to the RE2 repository.
 # The AUTHORS file lists the copyright holders; this file
 # lists people.  For example, Google employees are listed here
 # but not in AUTHORS, because Google holds the copyright.
 #
 # The submission process automatically checks to make sure
 # that people submitting code are listed in this file (by email address).
 #
 # Names should be added to this file only after verifying that
 # the individual or the individual's organization has agreed to
 # the appropriate Contributor License Agreement, found here:
 #
 #     http://code.google.com/legal/individual-cla-v1.0.html
 #     http://code.google.com/legal/corporate-cla-v1.0.html
 #
 # The agreement for individuals can be filled out on the web.
 #
 # When adding J Random Contributor's name to this file,
 # either J's name or J's organization's name should be
 # added to the AUTHORS file, depending on whether the
 # individual or corporate CLA was used.
 
 # Names should be added to this file like so:
 #     Name <email address>
 
 # Please keep the list sorted.
 
+Brian Gunlogson <unixman83@gmail.com>
 Dominic Battré <battre@chromium.org>
-Doug Kwan <dougkwan@google.com>
-Dmitriy Vyukov <dvyukov@google.com>
 John Millikin <jmillikin@gmail.com>
-Mike Nazarewicz <mpn@google.com>
-Nico Weber <thakis@chromium.org>
-Pawel Hajdan <phajdan.jr@gmail.com>
 Rob Pike <r@google.com>
 Russ Cox <rsc@swtch.com>
 Sanjay Ghemawat <sanjay@google.com>
 Stefano Rivera <stefano.rivera@gmail.com>
 Srinivasan Venkatachary <vsri@google.com>
-Viatcheslav Ostapenko <sl.ostapenko@samsung.com>