🔥 Remove bindings unnecessary null assertion operand

Author: AlexV525

lib/src/delegates/asset_picker_builder_delegate.dart

@@ -10,7 +10,6 @@ import 'dart:ui' as ui;
 
 import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter/scheduler.dart';
 import 'package:flutter/semantics.dart';
 import 'package:flutter/services.dart';
 import 'package:photo_manager/photo_manager.dart';
@@ -2152,7 +2151,7 @@ class DefaultAssetPickerBuilderDelegate
     // Schedule the scroll position's restoration callback if this feature
     // is enabled and offsets are different.
     if (keepScrollOffset && Singleton.scrollPosition != null) {
-      SchedulerBinding.instance!.addPostFrameCallback((_) {
+      WidgetsBinding.instance.addPostFrameCallback((_) {
         // Update only if the controller has clients.
         if (gridScrollController.hasClients) {
           gridScrollController.jumpTo(Singleton.scrollPosition!.pixels);

lib/src/widget/asset_picker.dart

@@ -91,7 +91,7 @@ class AssetPickerState<Asset, Path> extends State<AssetPicker<Asset, Path>>
   @override
   void initState() {
     super.initState();
-    WidgetsBinding.instance!.addObserver(this);
+    WidgetsBinding.instance.addObserver(this);
     AssetPicker.registerObserve(_onLimitedAssetsUpdated);
     widget.builder.initState(this);
   }
@@ -108,7 +108,7 @@ class AssetPickerState<Asset, Path> extends State<AssetPicker<Asset, Path>>
 
   @override
   void dispose() {
-    WidgetsBinding.instance!.removeObserver(this);
+    WidgetsBinding.instance.removeObserver(this);
     AssetPicker.unregisterObserve(_onLimitedAssetsUpdated);
     widget.builder.dispose();
     super.dispose();