remove: remove code to support obsolete SIS asset (0.3.x-preview) (#458)

Author: sindharta

Runtime/Scripts/Features/ImageFolderPlayableAsset.cs

@@ -254,10 +254,7 @@ internal void RefreshPlayableFrames() {
 
 //----------------------------------------------------------------------------------------------------------------------    
     [HideInInspector][SerializeField] protected string       m_folder         = null;
-    
-    //[TODO-sin: 2020-9-9] Obsolete, and should be removed completely before releasing
-    [HideInInspector][SerializeField] protected List<string> m_imageFileNames = null; //file names, not paths
-    
+        
     [HideInInspector][SerializeField] protected List<WatchedFileInfo> m_imageFiles = null; //store file names, not paths
 
     [HideInInspector][SerializeField] private Color m_timelineBGColor = Color.gray;

Runtime/Scripts/Features/RenderCache/RenderCachePlayableAsset.cs

@@ -48,15 +48,6 @@ public void OnAfterDeserialize() {
             m_editorConfig = new RenderCachePlayableAssetEditorConfig();                 
         }
 
-
-        if (m_version < (int) RenderCachePlayableAssetVersion.WATCHED_FILE_0_4) {
-
-            if (null != m_imageFileNames && m_imageFileNames.Count > 0) {
-                m_imageFiles = WatchedFileInfo.CreateList(m_folder, m_imageFileNames);
-                m_imageFileNames.Clear();
-            }             
-        }
-
         if (m_version < (int) RenderCachePlayableAssetVersion.CONFIG_0_7) {
             m_editorConfig.SetUpdateBGColor(m_updateBGColor);
         }

Runtime/Scripts/Features/SIS/StreamingImageSequencePlayableAsset.cs

@@ -444,10 +444,6 @@ public void OnBeforeSerialize() {
 
     public void OnAfterDeserialize() {
         if (m_version < (int) SISPlayableAssetVersion.WATCHED_FILE_0_4) {
-            if (null != m_imageFileNames && m_imageFileNames.Count > 0) {
-                m_imageFiles = WatchedFileInfo.CreateList(m_folder, m_imageFileNames);
-                m_imageFileNames.Clear();
-            }             
 
             //Use the folder defined in older version if set
             if (string.IsNullOrEmpty(m_folder) && !string.IsNullOrEmpty(Folder)) {