fix yamato scripts

add_sample.sh

 mkdir Samples
 cd Samples
 
-cp -r ../../Samples/UIWidgetsSamples_2019_4/Assets UIWidgetsSamples
+# skip copying samples
+# cp -r ../../Samples/UIWidgetsSamples_2019_4/Assets UIWidgetsSamples
 
 echo "Finished the sample preparation."

com.unity.uiwidgets/Runtime/foundation/basic_types.cs

 using System;
 using System.Collections.Generic;
-using System.Linq;
-using Unity.UIWidgets.InternalBridge;
 using UnityEngine;
 using Object = UnityEngine.Object;
 

com.unity.uiwidgets/Runtime/foundation/collections.cs

 using System;
 using System.Collections.Generic;
-using System.Linq;
-using Unity.UIWidgets.InternalBridge;
 
 namespace Unity.UIWidgets.foundation {
     public static class CollectionUtils {
             }
             return "{ " + string.Join(", ", LinqUtils<string,T>.SelectList(it,(item => item.ToString()))) + " }";
         }
-
-        public static void reset<T>(this List<T> list, int size) {
-            NoAllocHelpersBridge<T>.EnsureListElemCount(list, size);
-        }
-
-        public static ref T refAt<T>(this List<T> list, int index) {
-            var array = NoAllocHelpersBridge<T>.ExtractArrayFromListT(list);
-            return ref array[index];
-        }
-
-        public static T[] array<T>(this List<T> list) {
-            return NoAllocHelpersBridge<T>.ExtractArrayFromListT(list);
-        }
-
+        
         public static List<T> CreateRepeatedList<T>(T value, int length) {
             List<T> newList = new List<T>(length);
             for (int i = 0; i < length; i++) {

prepare_package.sh

 
 printf "Preparing package:\n"
 
-cd com.unity.uiwidgets
+#skip remove stuffs
+#cd com.unity.uiwidgets
-rm -rf Runtime/Plugins
-rm -f Runtime/Plugins.meta
-rm -rf Runtime/Resources/images
-rm -f Runtime/Resources/images.meta
-rm -rf Runtime/Resources/fonts
-rm -f Runtime/Resources/fonts.meta
+#rm -rf Runtime/Plugins
+#rm -f Runtime/Plugins.meta
+#rm -rf Runtime/Resources/images
+#rm -f Runtime/Resources/images.meta
+#rm -rf Runtime/Resources/fonts
+#rm -f Runtime/Resources/fonts.meta
-echo "Removed Resources and Plugins。"
+#echo "Removed Resources and Plugins。"
 
 

com.unity.uiwidgets/Runtime/Resources.meta

-fileFormatVersion: 2
-guid: 95dc2df730ba4da9902c271af522b4c2
-timeCreated: 1533739106

com.unity.uiwidgets/Runtime/InternalBridge.meta

-fileFormatVersion: 2
-guid: 6692331a428d6455c97baf446a850594
-folderAsset: yes
-DefaultImporter:
-  externalObjects: {}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: