meta-aspeed: remove invalid email

Cleaning up the OWNERS files to reduce the amount of "does not resolve
to any account" errors that pop up consistently in the gerrit logs.

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: I0855112d10982a9c08f8a9102e3045a513e91e72
diff --git a/meta-aspeed/OWNERS b/meta-aspeed/OWNERS
index 37f0a2f9..aa070d7 100644
--- a/meta-aspeed/OWNERS
+++ b/meta-aspeed/OWNERS
@@ -4,5 +4,4 @@
 matchers:
 - partial_regex: recipes-bsp/u-boot
   reviewers:
-   - chiawei_wang@aspeedtech.com
    - zweiss@equinix.com