Revert "CHROMIUM: Add a metadata/md5-cache/OWNERS"

This reverts commit 8f06333b67859872a9e666ad4f24b1fe81bf1e1c.

Reason for revert: There are no files in metadata/md5-cache

Original change's description:
> CHROMIUM: Add a metadata/md5-cache/OWNERS
>
> Add a metadata owners file so bot can regenerate configs.
>
> BUG=none
> TEST=none
>
> Change-Id: Ia730553bef366dc3ffcb84aea1af2963df3af1b1
> Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/zephyr/cmsis_6/+/6554642
> Tested-by: Fabio Baltieri <fabiobaltieri@google.com>
> Reviewed-by: Jon Murphy <jpmurphy@google.com>

BUG=none

Change-Id: Ieecad6c856e64628d3e1eae2e66b7037a82b3803
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/zephyr/cmsis_6/+/7281773
Reviewed-by: Jon Murphy <jpmurphy@google.com>
Commit-Queue: Jeremy Bettis <jbettis@chromium.org>
Reviewed-by: Fabio Baltieri <fabiobaltieri@google.com>
Auto-Submit: Jeremy Bettis <jbettis@chromium.org>
Tested-by: Jeremy Bettis <jbettis@chromium.org>
diff --git a/metadata/md5-cache/OWNERS b/metadata/md5-cache/OWNERS
deleted file mode 100644
index 1ae1238..0000000
--- a/metadata/md5-cache/OWNERS
+++ /dev/null
@@ -1,2 +0,0 @@
-# Contents in here are generated.
-*