Remove unused imports

lib/ui/components/action_sheet_widget.dart

@@ -1,5 +1,3 @@
-import 'dart:ui';
-
 import 'package:flutter/material.dart';
 import 'package:modal_bottom_sheet/modal_bottom_sheet.dart';
 import 'package:photos/core/constants.dart';

lib/ui/tools/collage/collage_with_four_items.dart

@@ -1,5 +1,4 @@
 import "package:flutter/material.dart";
-import "package:flutter/widgets.dart";
 import "package:flutter_staggered_grid_view/flutter_staggered_grid_view.dart";
 import "package:photos/models/file.dart";
 import "package:photos/ui/tools/collage/collage_common_widgets.dart";

lib/ui/tools/collage/collage_with_three_items.dart

@@ -1,5 +1,4 @@
 import "package:flutter/material.dart";
-import "package:flutter/widgets.dart";
 import "package:flutter_staggered_grid_view/flutter_staggered_grid_view.dart";
 import "package:photos/models/file.dart";
 import "package:photos/ui/tools/collage/collage_common_widgets.dart";

lib/utils/file_util.dart

@@ -1,7 +1,6 @@
 import 'dart:async';
 import 'dart:io' as io;
 import 'dart:io';
-import 'dart:typed_data';
 
 import 'package:archive/archive.dart';
 import 'package:dio/dio.dart';