优化代码

app/src/main/java/io/legado/app/base/adapter/DiffRecyclerAdapter.kt

@@ -26,8 +26,6 @@ abstract class DiffRecyclerAdapter<ITEM, VB : ViewBinding>(protected val context
         }
     }
 
-    private val lock = Object()
-
     private var itemClickListener: ((holder: ItemViewHolder, item: ITEM) -> Unit)? = null
     private var itemLongClickListener: ((holder: ItemViewHolder, item: ITEM) -> Boolean)? = null
 

app/src/main/java/io/legado/app/base/adapter/RecyclerAdapter.kt

@@ -26,8 +26,6 @@ abstract class RecyclerAdapter<ITEM, VB : ViewBinding>(protected val context: Co
 
     private val items: MutableList<ITEM> = mutableListOf()
 
-    private val lock = Object()
-
     private var itemClickListener: ((holder: ItemViewHolder, item: ITEM) -> Unit)? = null
     private var itemLongClickListener: ((holder: ItemViewHolder, item: ITEM) -> Boolean)? = null