Revert "提交修改"

This reverts commit 5750c4fe56.

Assets/Scripts/NBC/Runtime/Plugins/Protobuf-net/Meta/ProtoSyntax.cs

@@ -0,0 +1,17 @@
+namespace ProtoBuf.Meta
+{
+    /// <summary>
+    /// Indiate the variant of the protobuf .proto DSL syntax to use
+    /// </summary>
+    public enum ProtoSyntax
+    {
+        /// <summary>
+        /// https://developers.google.com/protocol-buffers/docs/proto
+        /// </summary>
+        Proto2 = 0,
+        /// <summary>
+        /// https://developers.google.com/protocol-buffers/docs/proto3
+        /// </summary>
+        Proto3 = 1,
+    }
+}