Remove some obsolete GYP references in chrome/

Review-Url: https://codereview.chromium.org/2388323002
Cr-Commit-Position: refs/heads/master@{#422953}

chrome/OWNERS

@@ -11,29 +11,4 @@ thestig@chromium.org
 # These are for the common case of adding or renaming files. If you're doing
 # structural changes, please get a review from a reviewer in this file.
 per-file *.gni=*
-per-file *.gypi=*
-per-file *.isolate=maruel@chromium.org
-per-file *.isolate=tandrii@chromium.org
-per-file *.isolate=vadimsh@chromium.org
 per-file BUILD.gn=file://build/OWNERS
-
-# Android OWNERS from chrome/android/OWNERS
-per-file chrome_android*.gypi=bauerb@chromium.org
-per-file chrome_android*.gypi=dtrainor@chromium.org
-per-file chrome_android*.gypi=miguelg@chromium.org
-per-file chrome_android*.gypi=nyquist@chromium.org
-per-file chrome_android*.gypi=tedchoc@chromium.org
-per-file chrome_android*.gypi=yfriedman@chromium.org
-
-# Chrome OS OWNERS from chrome/browser/chromeos/OWNERS
-per-file chrome_browser_chromeos.gypi=achuith@chromium.org
-per-file chrome_browser_chromeos.gypi=derat@chromium.org
-per-file chrome_browser_chromeos.gypi=oshima@chromium.org
-per-file chrome_browser_chromeos.gypi=satorux@chromium.org
-per-file chrome_browser_chromeos.gypi=stevenjb@chromium.org
-per-file chrome_browser_chromeos.gypi=xiyuan@chromium.org
-per-file chrome_browser_chromeos.gypi=zelidrag@chromium.org
-
-# Syzygy files.
-per-file chrome_syzygy.gyp*=chrisha@chromium.org
-per-file chrome_syzygy.gyp*=siggi@chromium.org

chrome/android/OWNERS

@@ -9,4 +9,3 @@ yfriedman@chromium.org
 
 per-file java_sources.gni=*
 per-file *.gn*=agrieve@chromium.org
-per-file *.gyp*=agrieve@chromium.org

chrome/common/features.gni

@@ -2,9 +2,6 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-# This is the GN version of //chrome/chrome_features.gypi.
-# Please keep in sync!
-
 import("//build/config/chrome_build.gni")
 import("//build/config/chromecast_build.gni")
 import("//build/config/compiler/compiler.gni")

chrome/installer/OWNERS

@@ -1,7 +1,3 @@
 gab@chromium.org
 grt@chromium.org
 robertshield@chromium.org
-
-# Syzygy files.
-per-file mini_installer_syzygy.gyp=chrisha@chromium.org
-per-file mini_installer_syzygy.gyp=siggi@chromium.org