Revert of GN

DEPS

Index: DEPS
diff --git a/DEPS b/DEPS
index 539b6a81befa680914ab1b17410a0c3a92e14c7c..9504771f1cabb9eedcac8aaeabf8032b60f9d06e 100644
--- a/DEPS
+++ b/DEPS
@@ -3,10 +3,6 @@
 # Dependencies on outside packages.
 #
 deps = {
-  "build":  "https://chromium.googlesource.com/chromium/src/build.git@54b609cc558d57003c7a7d657edcc25a3879bf78",
-  "buildtools": "https://chromium.googlesource.com/chromium/buildtools.git@3780bc523aad1d68a5bd00e05c453a80b2ba0b35",
-  "tools/clang": "https://chromium.googlesource.com/chromium/src/tools/clang.git@ea64c667cd841b2c3268bd7dfd223269f3ea23ba",
-
   "common": "https://skia.googlesource.com/common.git@c282fe0b6e392b14f88d647cbd86e1a3ef5498e0",
 
   # There is some duplication here that might be worth cleaning up:
@@ -67,54 +63,3 @@
 }
 
 recursedeps = [ "common" ]
-
-hooks = [
-  # Download GN.
-  {
-    'name': 'gn_win',
-    'action': [ 'download_from_google_storage',
-                '--quiet',
-                '--no_resume',
-                '--platform=win32',
-                '--no_auth',
-                '--bucket', 'chromium-gn',
-                '-s', 'buildtools/win/gn.exe.sha1',
-    ],
-  },
-  {
-    'name': 'gn_mac',
-    'pattern': '.',
-    'action': [ 'download_from_google_storage',
-                '--quiet',
-                '--no_resume',
-                '--platform=darwin',
-                '--no_auth',
-                '--bucket', 'chromium-gn',
-                '-s', 'buildtools/mac/gn.sha1',
-    ],
-  },
-  {
-    'name': 'gn_linux64',
-    'pattern': '.',
-    'action': [ 'download_from_google_storage',
-                '--quiet',
-                '--no_resume',
-                '--platform=linux*',
-                '--no_auth',
-                '--bucket', 'chromium-gn',
-                '-s', 'buildtools/linux64/gn.sha1',
-    ],
-  },
-  # Download Clang.
-  {
-    'name': 'clang',
-    'pattern': '.',
-    'action': [ 'python', 'tools/clang/scripts/update.py', '--if-needed' ],
-  },
-  # Download Linux sysroot.
-  {
-    'name': 'sysroot',
-    'pattern': '.',
-    'action': [ 'python', 'build/linux/sysroot_scripts/install-sysroot.py', '--arch=amd64' ],
-  },
-]