OWNERS: drop support/chromite_wrapper for now

This syntax seems to be invalid, so remove it to unblock others.

Bug: 900461
No-Presubmit: True
Change-Id: I16569b8f8236a14b6dc879c973e4925a99649ac2
Reviewed-on: https://chromium-review.googlesource.com/c/1382975
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Bruce Dawson <brucedawson@chromium.org>
Reviewed-by: Andrii Shyshkalov <tandrii@chromium.org>

OWNERS

@@ -25,4 +25,3 @@ per-file chrome_set_ver=file://CROS_OWNERS
 per-file cros=file://CROS_OWNERS
 per-file cros_sdk=file://CROS_OWNERS
 per-file repo=file://CROS_OWNERS
-per-file support/chromite_wrapper=file://CROS_OWNERS