GN: remove hooks again

DEPS

 use_relative_paths = True
 
 # Dependencies on outside packages.
 #
 deps = {
   "buildtools":  "https://chromium.googlesource.com/chromium/buildtools.git@60f7f9a8b421ebf9a46041dfa2ff11c0fe59c582",
 
   "common": "https://skia.googlesource.com/common.git@c282fe0b6e392b14f88d647cbd86e1a3ef5498e0",
 
   # There is some duplication here that might be worth cleaning up:
@@ skipping 46 matching lines @@
   'llvm': {
     # xSAN bots build Clang from scratch.
     "third_party/externals/llvm": "https://llvm.googlesource.com/llvm@release_38",
     "third_party/externals/llvm/tools/clang": "https://llvm.googlesource.com/clang@release_38",
     "third_party/externals/llvm/projects/compiler-rt": "https://llvm.googlesource.com/compiler-rt@release_38",
     "third_party/externals/llvm/projects/libcxx": "https://llvm.googlesource.com/libcxx@release_38",
     "third_party/externals/llvm/projects/libcxxabi": "https://llvm.googlesource.com/libcxxabi@release_38",
   }
 }
 
-hooks = [{
-    'pattern': '.',
-    'action': ['download_from_google_storage',
-               '--quiet',
-               '--no_resume',
-               '--no_auth',
-               '--bucket', 'chromium-gn',
-               '--platform=linux*',
-               '-s', 'buildtools/linux64/gn.sha1'],
-},{
-    'pattern': '.',
-    'action': ['download_from_google_storage',
-               '--quiet',
-               '--no_resume',
-               '--no_auth',
-               '--bucket', 'chromium-gn',
-               '--platform=darwin',
-               '-s', 'buildtools/mac/gn.sha1'],
-},{
-    'pattern': '.',
-    'action': ['download_from_google_storage',
-               '--quiet',
-               '--no_resume',
-               '--no_auth',
-               '--bucket', 'chromium-gn',
-               '--platform=win32',
-               '-s', 'buildtools/win/gn.exe.sha1'],
-}]
-
 recursedeps = [ "common" ]