Remove David Blewett from list, per his comment on GitHub.

relicensing-apachev2.txt

@@ -18,7 +18,6 @@ dual Apachev2/GPLv2:
 Artem Tikhomirov <artem.tikhomirov@syntevo.com>
 Chris Eberle <eberle1080@gmail.com>
 Damien Tournoud <damien@commerceguys.com>
-David Blewett <davidb@sixfeetup.com>
 Dmitriy <dkomarov@gmail.com>
 Gary van der Merwé <garyvdm@gmail.com>
 Jameson Nash <jameson@mit.edu>