clean project

Assets/Oculus/Interaction/Runtime/Scripts/Attributes/OptionalAttribute.cs

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+/************************************************************************************
+Copyright : Copyright (c) Facebook Technologies, LLC and its affiliates. All rights reserved.
+
+Your use of this SDK or tool is subject to the Oculus SDK License Agreement, available at
+https://developer.oculus.com/licenses/oculussdk/
+
+Unless required by applicable law or agreed to in writing, the Utilities SDK distributed
+under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
+ANY KIND, either express or implied. See the License for the specific language governing
+permissions and limitations under the License.
+************************************************************************************/
+
+using UnityEngine;
+
+namespace Oculus.Interaction
+{
+    /// <summary>
+    /// Used on a SerializedField surfaces the expectation that this field can remain empty.
+    /// </summary>
+    public class OptionalAttribute : PropertyAttribute
+    {
+        public OptionalAttribute() { }
+    }
+}