Remove defaultorigin from .gitreview

This is interfering with the Github2Gerrit action, and is not
necessary for normal functionality (it will force a remote named
"gerrit" to be created, but this is a normal need in the Gerrit
workflow).

Signed-off-by: Eric Ball <eball@linuxfoundation.org>
Change-Id: I572ebe8be8c30ed65cdd0f5f52385b7e350e5964
diff --git a/.gitreview b/.gitreview
index 0111042..302eef1 100644
--- a/.gitreview
+++ b/.gitreview
@@ -2,4 +2,3 @@
 host=gerrit.lfbroadband.org
 port=29418
 project=device-management-interface.git
-defaultremote=origin