Revert "soc/mediatek: Add MTK blob owners"

This reverts commit 6b6494908a1c3be76b25311b55ee07ffa00e8bbc.

Reason for revert: Changes should be applied upstream

Original change's description:
> soc/mediatek: Add MTK blob owners
>
> Set MTK bringup team firmware developers to be owner of mediatek
> sub folder since there will be very frequent updates to memory
> training blobs.
>
> BUG=None
> TEST=None
>
> Change-Id: Idd889fd4383295a3568d63d7f6834bf52a7466d4
> Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/coreboot/blobs/+/1918503
> Tested-by: Hung-Te Lin <hungte@chromium.org>
> Reviewed-by: Yu-Ping Wu <yupingso@chromium.org>
> Reviewed-by: Furquan Shaikh <furquan@chromium.org>
> Commit-Queue: Hung-Te Lin <hungte@chromium.org>
> Auto-Submit: Hung-Te Lin <hungte@chromium.org>

BUG=None

Change-Id: I29d9af5e03d368f8ca77f69a7f8f947de7093cbb
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/coreboot/blobs/+/4659862
Tested-by: Jonathon Murphy <jpmurphy@google.com>
Auto-Submit: Jonathon Murphy <jpmurphy@google.com>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Commit-Queue: Hung-Te Lin <hungte@chromium.org>
diff --git a/soc/mediatek/OWNERS b/soc/mediatek/OWNERS
deleted file mode 100644
index e26614f..0000000
--- a/soc/mediatek/OWNERS
+++ /dev/null
@@ -1,2 +0,0 @@
-hungte@chromium.org
-yupingso@chromium.org