More cleanup, based around searches for "Google.ProtocolBuffers"

- Remove some old proto2-based C#-only messages
- Remove the "build" directory which only contained out-of-date files
- Remove the csharp_namespace option from proto2 messages
- Change "Google.ProtocolBuffers" to "Google.Protobuf" in other messages

1 files changed, 0 insertions, 2 deletions

diff --git a/src/google/protobuf/map_proto2_unittest.proto b/src/google/protobuf/map_proto2_unittest.proto
index 04ca6170..3d4af28e 100644
--- a/src/google/protobuf/map_proto2_unittest.proto
+++ b/src/google/protobuf/map_proto2_unittest.proto
@@ -36,8 +36,6 @@ syntax = "proto2";
 // In map_test_util.h we do "using namespace unittest = protobuf_unittest".
 package protobuf_unittest;
 
-option csharp_namespace = "Google.ProtocolBuffers.TestProtos";
-
 enum Proto2MapEnum {
   PROTO2_MAP_ENUM_FOO   = 0;
   PROTO2_MAP_ENUM_BAR   = 1;