Remove obsolete reference to master branch.

Change-Id: Ie37bac86e0b7d19eabb5cd71500f77387f2f95e3

project.config

diff --git a/project.config b/project.config
index 4a57b63..e5b096f 100644
--- a/project.config
+++ b/project.config
@@ -77,8 +77,6 @@
 	pushMerge = deny group Registered Users
 [reviewer]
 	enableByEmail = true
-[access "refs/for/refs/heads/master"]
-	exclusiveGroupPermissions = addPatchSet push
 [access "refs/for/refs/meta/config"]
 	push = group gerrit-submit-requirements-admins
 	read = group gerrit-submit-requirements-admins