Disable mojo_shell download hook temporarily

DEPS

Index: DEPS
diff --git a/DEPS b/DEPS
index 0af0bba270190816d88f1e8a6081fc1fb2a902b6..a4dcb3a1fadfd123699db1ba2dee906bd3b1217f 100644
--- a/DEPS
+++ b/DEPS
@@ -748,11 +748,12 @@ hooks = [
     ],
   },
   # Pull the mojo_shell binary, used for mojo development
-  {
-    'name': 'download_mojo_shell',
-    'pattern': '',
-    'action': [ 'python', 'src/mojo/public/tools/download_shell_binary.py' ],
-  },
+# TODO(jamesr): Figure out auth issues and re-enable.
+#{
+#    'name': 'download_mojo_shell',
+#    'pattern': '',
+#    'action': [ 'python', 'src/mojo/public/tools/download_shell_binary.py' ],
+#  },
   {
     # A change to a .gyp, .gypi, or to GYP itself should run the generator.
     'name': 'gyp',