Revert "third_party/protobuf: Update to HEAD (83d681ee2c)"

third_party/protobuf/csharp/src/Google.Protobuf/Compatibility/PropertyInfoExtensions.cs

Index: third_party/protobuf/csharp/src/Google.Protobuf/Compatibility/PropertyInfoExtensions.cs
diff --git a/third_party/protobuf/csharp/src/Google.Protobuf/Compatibility/PropertyInfoExtensions.cs b/third_party/protobuf/csharp/src/Google.Protobuf/Compatibility/PropertyInfoExtensions.cs
index e3914dd3749598becd41ffc95f144c2294dd7750..8a6fefa74e88ab99e2876e7265dcaa682c15e65c 100644
--- a/third_party/protobuf/csharp/src/Google.Protobuf/Compatibility/PropertyInfoExtensions.cs
+++ b/third_party/protobuf/csharp/src/Google.Protobuf/Compatibility/PropertyInfoExtensions.cs
@@ -47,11 +47,7 @@ namespace Google.Protobuf.Compatibility
         /// </summary>
         internal static MethodInfo GetGetMethod(this PropertyInfo target)
         {
-#if DOTNET35
-            var method = target.GetGetMethod();
-#else
             var method = target.GetMethod;
-#endif
             return method != null && method.IsPublic ? method : null;
         }
 
@@ -61,11 +57,7 @@ namespace Google.Protobuf.Compatibility
         /// </summary>
         internal static MethodInfo GetSetMethod(this PropertyInfo target)
         {
-#if DOTNET35
-            var method = target.GetSetMethod();
-#else
             var method = target.SetMethod;
-#endif
             return method != null && method.IsPublic ? method : null;
         }
     }