Remove matthewb from OWNERS.

BUG=None
TEST=None

Change-Id: I7deca2347b5968a0faf3222a9dbc8f57fc035b0d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crostestutils/+/6174313
Commit-Queue: Keith Haddow <[email protected]>
Tested-by: Keith Haddow <[email protected]>
Reviewed-by: Garry Wang <[email protected]>
Commit-Queue: Garry Wang <[email protected]>
Auto-Submit: Keith Haddow <[email protected]>
diff --git a/OWNERS b/OWNERS
index 41ed35d..6f7c742 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,7 +1,6 @@
 [email protected]
 [email protected]
 [email protected]
[email protected]
 [email protected]
 [email protected]
 [email protected]