Remove pkg/OWNERS.

The intention of this file was to allow any change to files in `pkg/`
to be approved by anyone in OWNERS_ECOSYSTEM, OWNERS_FOUNDATION, or
OWNERS_INFRA, but that if the package itself specifies other owners,
then those owners should be preferred when suggesting owners.

What was actually happening was that the `#{LAST_RESORT_SUGGESTION}`
annotation only has an effect on lines that name a specific user; it
is ignored on `file:` lines. (See docs at
https://gerrit.googlesource.com/plugins/code-owners/+/refs/heads/master/resources/Documentation/backend-find-owners.md#annotations). So
people in OWNERS_ECOSYSTEM, OWNERS_FOUNDATION, and OWNERS_INFRA were
included in the suggested owners. Fortunately it was not too serious a
problem in practice, because the "find owners" backend seems to have
other heuristics that favor recent reviewers. But it still produced
surprising output when using Gerrit's "suggest all owners" checkbox.

I discussed this with athom@google.com, and we decided to just drop
the `pkg/OWNERS` file altogether.

There was one useful line in that file, assigning `pkg.status` to
OWNERS_ENG. That has been moved to the top level OWNERS file.

Change-Id: I8906ffcd18ffd35055f1401d40a3c3e7fc0eb3a2
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/414183
Auto-Submit: Paul Berry <paulberry@google.com>
Reviewed-by: Alexander Thomas <athom@google.com>
Commit-Queue: Paul Berry <paulberry@google.com>

https://dart.googlesource.com/sdk/+/957c9a1247b06015038cb9943f34d44818c3f8a9
diff --git a/DEPS b/DEPS
index 1f624d4..e1267d5 100644
--- a/DEPS
+++ b/DEPS
@@ -234,7 +234,7 @@
 ]
 
 deps = {
-  'flutter/engine/src/flutter/third_party/dart': Var('dart_git') + '/sdk' + '@' + '82c3d74505384fe55052d082d6650fa980156440',
+  'flutter/engine/src/flutter/third_party/dart': Var('dart_git') + '/sdk' + '@' + '957c9a1247b06015038cb9943f34d44818c3f8a9',
 
   'flutter': Var('flutter_git') + '/mirrors/flutter' + '@' + '6b93cf93c1008636b0dd5b1c7409f20c4266571a',
 
diff --git a/commits.json b/commits.json
index 27578cb..6336e6e 100644
--- a/commits.json
+++ b/commits.json
@@ -1,4 +1,4 @@
 {
   "flutter":"6b93cf93c1008636b0dd5b1c7409f20c4266571a",
-  "flutter/engine/src/flutter/third_party/dart":"82c3d74505384fe55052d082d6650fa980156440"
+  "flutter/engine/src/flutter/third_party/dart":"957c9a1247b06015038cb9943f34d44818c3f8a9"
 }
\ No newline at end of file