Remove unnecessary lambda based listener

app/src/main/kotlin/com/simplemobiletools/applauncher/activities/MainActivity.kt

@@ -124,7 +124,7 @@ class MainActivity : SimpleActivity(), RefreshRecyclerViewListener {
         checkInvalidApps()
         initZoomListener()
         setupAdapter(displayedLaunchers)
-        maybeShowEmptyView(displayedLaunchers)
+        maybeShowEmptyView()
     }
 
     private fun setupAdapter(launchers: ArrayList<AppLauncher>) {
@@ -136,7 +136,6 @@ class MainActivity : SimpleActivity(), RefreshRecyclerViewListener {
             launchers = launchers,
             listener = this,
             recyclerView = launchers_grid,
-            onItemsRemoved = ::onItemsRemoved,
         ) {
             hideKeyboard()
             val launchIntent = packageManager.getLaunchIntentForPackage((it as AppLauncher).packageName)
@@ -280,11 +279,7 @@ class MainActivity : SimpleActivity(), RefreshRecyclerViewListener {
         }
     }
 
-    private fun onItemsRemoved() {
-        maybeShowEmptyView()
-    }
-
-    private fun maybeShowEmptyView(displayedLaunchers: ArrayList<AppLauncher> = dbHelper.getLaunchers()) {
+    private fun maybeShowEmptyView() {
         val emptyViews = arrayOf(add_icons_placeholder, no_items_placeholder)
         if (displayedLaunchers.isEmpty()) {
             launchers_fastscroller.fadeOut()

app/src/main/kotlin/com/simplemobiletools/applauncher/adapters/LaunchersAdapter.kt

@@ -31,7 +31,6 @@ class LaunchersAdapter(
     val launchers: ArrayList<AppLauncher>,
     val listener: RefreshRecyclerViewListener?,
     recyclerView: MyRecyclerView,
-    var onItemsRemoved: (() -> Unit)? = null,
     itemClick: (Any) -> Unit
 ) : MyRecyclerViewAdapter(activity, recyclerView, itemClick), ItemTouchHelperContract, RecyclerViewFastScroller.OnPopupTextUpdate {
 
@@ -179,7 +178,9 @@ class LaunchersAdapter(
         activity.dbHelper.deleteLaunchers(removeIds)
         positions.sortDescending()
         removeSelectedItems(positions)
-        onItemsRemoved?.invoke()
+        if (launchers.isEmpty()) {
+            listener?.refreshItems()
+        }
     }
 
     private fun setupView(view: View, launcher: AppLauncher, holder: ViewHolder) {