Reverts third_party/protobuf: Update to HEAD (f52e188fe4)

third_party/protobuf/python/setup.py

Index: third_party/protobuf/python/setup.py
diff --git a/third_party/protobuf/python/setup.py b/third_party/protobuf/python/setup.py
index ef1a31b40fe788bbd9ea9463c975ab848a139e34..0f4b53c4ab7b3e4c25e0b4a9079bce17c43f711f 100755
--- a/third_party/protobuf/python/setup.py
+++ b/third_party/protobuf/python/setup.py
@@ -76,9 +76,7 @@ def generate_proto(source, require = True):
       sys.exit(-1)
 
 def GenerateUnittestProtos():
-  generate_proto("../src/google/protobuf/any_test.proto", False)
   generate_proto("../src/google/protobuf/map_unittest.proto", False)
-  generate_proto("../src/google/protobuf/test_messages_proto3.proto", False)
   generate_proto("../src/google/protobuf/unittest_arena.proto", False)
   generate_proto("../src/google/protobuf/unittest_no_arena.proto", False)
   generate_proto("../src/google/protobuf/unittest_no_arena_import.proto", False)
@@ -96,7 +94,6 @@ def GenerateUnittestProtos():
   generate_proto("google/protobuf/internal/descriptor_pool_test2.proto", False)
   generate_proto("google/protobuf/internal/factory_test1.proto", False)
   generate_proto("google/protobuf/internal/factory_test2.proto", False)
-  generate_proto("google/protobuf/internal/file_options_test.proto", False)
   generate_proto("google/protobuf/internal/import_test_package/inner.proto", False)
   generate_proto("google/protobuf/internal/import_test_package/outer.proto", False)
   generate_proto("google/protobuf/internal/missing_enum_values.proto", False)
@@ -222,7 +219,6 @@ if __name__ == '__main__':
       name='protobuf',
       version=GetVersion(),
       description='Protocol Buffers',
-      download_url='https://github.com/google/protobuf/releases',
       long_description="Protocol Buffers are Google's data interchange format",
       url='https://developers.google.com/protocol-buffers/',
       maintainer='protobuf@googlegroups.com',