Update documentation to remove references to self-initialised arrays

README-zh_CN.md

@@ -863,7 +863,7 @@ export class Album {
         cascadeRemove: true  // 在移除Album时，会自动移除相册里的Photo
     })
     @JoinTable()
-    photos: Photo[] = []; // 初始化个Photo数组
+    photos: Photo[];
 }
 ```
   
@@ -880,7 +880,7 @@ export class Photo {
         cascadeUpdate: true, // 在更新Album时，会自动更新相册里的Photo 
         cascadeRemove: true  // 在移除Album时，会自动移除相册里的Photo
     })
-    albums: Album[] = []; // 初始化个Album数组
+    albums: Album[];
 }
 ```
 

README.md

@@ -945,7 +945,7 @@ export class Album {
         cascadeUpdate: true // Allow to update a photo on album save
     })
     @JoinTable()
-    photos: Photo[] = []; // We initialize array for convinience here
+    photos: Photo[];
 }
 ```
   
@@ -961,7 +961,7 @@ export class Photo {
         cascadeInsert: true, // Allow to insert a new album on photo save
         cascadeUpdate: true // Allow to update an album on photo save
     })
-    albums: Album[] = []; // We initialize array for convinience here
+    albums: Album[];
 }
 ```