Do not download Linux sysroots.

DEPS

 use_relative_paths = True
 
 vars = {
   'chromium_git': 'https://chromium.googlesource.com',
   'pdfium_git': 'https://pdfium.googlesource.com',
 
   'android_ndk_revision': '5022f40f12953c02b2614c5f7beb981ec5d0e833',
   'build_revision': 'b73bafdd0ff0efc8835de6e646b47eec0a2a38a4',
   'buildtools_revision': 'adb8bf4e8fc92aa1717bf151b862d58e6f27c4f2',
   'catapult_revision': '327256cb1c387e62a2c7e6960e2398867665fb51',
@@ skipping 109 matching lines @@
     'name': 'gn_linux64',
     'pattern': '.',
     'action': [ 'download_from_google_storage',
                 '--no_resume',
                 '--platform=linux*',
                 '--no_auth',
                 '--bucket', 'chromium-gn',
                 '-s', 'pdfium/buildtools/linux64/gn.sha1',
     ],
   },
-  {
-    # Downloads the current stable linux sysroot to build/linux/ if needed.
-    # This sysroot updates at about the same rate that the chrome build deps
-    # change. This script is a no-op except for linux users who are doing
-    # official chrome builds or cross compiling.
-    'name': 'sysroot',
-    'pattern': '.',
-    'action': ['python',
-               'pdfium/build/linux/sysroot_scripts/install-sysroot.py',
-               '--running-as-hook'
-    ],
-  },
   # Pull clang-format binaries using checked-in hashes.
   {
     'name': 'clang_format_win',
     'pattern': '.',
     'action': [ 'download_from_google_storage',
                 '--no_resume',
                 '--platform=win32',
                 '--no_auth',
                 '--bucket', 'chromium-clang-format',
                 '-s', 'pdfium/buildtools/win/clang-format.exe.sha1',
@@ skipping 30 matching lines @@
                '--if-needed'
     ],
   },
   {
     # Update the Windows toolchain if necessary.
     'name': 'win_toolchain',
     'pattern': '.',
     'action': ['python', 'pdfium/build/vs_toolchain.py', 'update'],
   },
 ]