Remove Unused enum values

Author: JoonghyunCho

src/Tizen.WindowSystem/src/Enums/GestureEdge.cs

@@ -9,11 +9,6 @@ namespace Tizen.WindowSystem
     [EditorBrowsable(EditorBrowsableState.Never)]
     public enum GestureEdge
     {
-        /// <summary>
-        /// edge none.
-        /// </summary>
-        None,
-
         /// <summary>
         /// edge top.
         /// </summary>

src/Tizen.WindowSystem/src/Enums/GestureEdgeSize.cs

@@ -9,11 +9,6 @@ namespace Tizen.WindowSystem
     [EditorBrowsable(EditorBrowsableState.Never)]
     public enum GestureEdgeSize
     {
-        /// <summary>
-        /// edge size none.
-        /// </summary>
-        None,
-
         /// <summary>
         /// edge size full.
         /// </summary>

src/Tizen.WindowSystem/src/Enums/GestureGrabMode.cs

@@ -9,11 +9,6 @@ namespace Tizen.WindowSystem
     [EditorBrowsable(EditorBrowsableState.Never)]
     public enum GestureGrabMode
     {
-        /// <summary>
-        /// mode none.
-        /// </summary>
-        None,
-
         /// <summary>
         /// mode exclusive.
         /// </summary>

src/Tizen.WindowSystem/src/Enums/GestureState.cs

@@ -9,11 +9,6 @@ namespace Tizen.WindowSystem
     [EditorBrowsable(EditorBrowsableState.Never)]
     public enum GestureState
     {
-        /// <summary>
-        /// None.
-        /// </summary>
-        None,
-
         /// <summary>
         /// Begin.
         /// </summary>