Remove infra/config directory because cq.cfg has been moved

https://chromium-review.googlesource.com/1437407 made it so that this cq.cfg has no effect.

Bug: chromium:916292
Change-Id: I2c35b11405836a54112611a9decd33bd21e1d4c3
Reviewed-on: https://chromium-review.googlesource.com/c/1442211
Commit-Queue: Frank Barchard <fbarchard@chromium.org>
Reviewed-by: Frank Barchard <fbarchard@chromium.org>

infra/config/OWNERS

-set noparent
-agable@chromium.org
-phoglund@chromium.org

infra/config/PRESUBMIT.py

-# Copyright 2018 The LibYuv Project Authors. All rights reserved.
-#
-# Use of this source code is governed by a BSD-style license
-# that can be found in the LICENSE file in the root of the source
-# tree. An additional intellectual property rights grant can be found
-# in the file PATENTS. All contributing project authors may
-# be found in the AUTHORS file in the root of the source tree.
-
-
-def CheckChangeOnUpload(input_api, output_api):
-  return input_api.canned_checks.CheckChangedLUCIConfigs(input_api, output_api)
-
-
-def CheckChangeOnCommit(input_api, output_api):
-  return input_api.canned_checks.CheckChangedLUCIConfigs(input_api, output_api)

infra/config/README.md

-This directory contains configuration files for infra services.

infra/config/cq.cfg

-# Commit Queue configuration file. The documentation of the format can be found
-# at http://luci-config.appspot.com/schemas/projects/refs:cq.cfg.
-
-version: 1
-cq_status_url: "https://chromium-cq-status.appspot.com"
-git_repo_url: "https://chromium.googlesource.com/libyuv/libyuv.git"
-
-gerrit {}
-
-verifiers {
-  gerrit_cq_ability {
-    committer_list: "project-libyuv-committers"
-    dry_run_access_list: "project-libyuv-tryjob-access"
-  }
-
-  try_job {
-    buckets {
-      name: "luci.libyuv.try"
-      builders { name: "win" }
-      builders { name: "win_rel" }
-      builders { name: "win_x64_rel" }
-      builders { name: "win_clang" }
-      builders { name: "win_clang_rel" }
-      builders { name: "win_x64_clang_rel" }
-      builders { name: "mac" }
-      builders { name: "mac_rel" }
-      builders { name: "mac_asan" }
-      builders { name: "ios" }
-      builders { name: "ios_rel" }
-      builders { name: "ios_arm64" }
-      builders { name: "ios_arm64_rel" }
-      builders { name: "linux" }
-      builders { name: "linux_rel" }
-      builders {
-        name: "linux_gcc"
-        experiment_percentage: 100
-      }
-      builders { name: "linux_tsan2" }
-      builders { name: "linux_asan" }
-      builders { name: "linux_msan" }
-      builders { name: "linux_ubsan" }
-      builders { name: "linux_ubsan_vptr" }
-      builders { name: "android" }
-      builders { name: "android_rel" }
-      builders { name: "android_arm64" }
-      builders { name: "android_x86" }
-      builders { name: "android_x64" }
-    }
-  }
-}