Remove custom `analysis_options.yaml` from `imitation_game_flutter` (#184717)

The default `analysis_options.yaml` file created by `flutter create` was
accidentally checked in for `imitation_game_flutter`. This was probably
a mistake and the top-level analysis_options rules should apply for this
package as well.

This PR also removes a duplicated `MaterialApp` widget that Gemini
found.

dev/benchmarks/imitation_game_flutter/analysis_options.yaml

diff --git a/dev/benchmarks/imitation_game_flutter/analysis_options.yaml b/dev/benchmarks/imitation_game_flutter/analysis_options.yaml
deleted file mode 100644
index 0d29021..0000000
--- a/dev/benchmarks/imitation_game_flutter/analysis_options.yaml
+++ /dev/null
@@ -1,28 +0,0 @@
-# This file configures the analyzer, which statically analyzes Dart code to
-# check for errors, warnings, and lints.
-#
-# The issues identified by the analyzer are surfaced in the UI of Dart-enabled
-# IDEs (https://dart.dev/tools#ides-and-editors). The analyzer can also be
-# invoked from the command line by running `flutter analyze`.
-
-# The following line activates a set of recommended lints for Flutter apps,
-# packages, and plugins designed to encourage good coding practices.
-include: package:flutter_lints/flutter.yaml
-
-linter:
-  # The lint rules applied to this project can be customized in the
-  # section below to disable rules from the `package:flutter_lints/flutter.yaml`
-  # included above or to enable additional rules. A list of all available lints
-  # and their documentation is published at https://dart.dev/lints.
-  #
-  # Instead of disabling a lint rule for the entire project in the
-  # section below, it can also be suppressed for a single line of code
-  # or a specific dart file by using the `// ignore: name_of_lint` and
-  # `// ignore_for_file: name_of_lint` syntax on the line or in the file
-  # producing the lint.
-  rules:
-    # avoid_print: false  # Uncomment to disable the `avoid_print` rule
-    # prefer_single_quotes: true  # Uncomment to enable the `prefer_single_quotes` rule
-
-# Additional information about this file can be found at
-# https://dart.dev/guides/language/analysis-options

dev/benchmarks/imitation_game_flutter/lib/main.dart

diff --git a/dev/benchmarks/imitation_game_flutter/lib/main.dart b/dev/benchmarks/imitation_game_flutter/lib/main.dart
index 706f93c..1b2966a 100644
--- a/dev/benchmarks/imitation_game_flutter/lib/main.dart
+++ b/dev/benchmarks/imitation_game_flutter/lib/main.dart
@@ -5,7 +5,7 @@
 import 'package:flutter/material.dart';
 
 void main() {
-  runApp(InfiniteScrollApp());
+  runApp(const InfiniteScrollApp());
 }
 
 class InfiniteScrollApp extends StatelessWidget {
@@ -15,7 +15,10 @@
   Widget build(BuildContext context) {
     return MaterialApp(
       title: 'Infinite Scrolling Flutter',
-      home: InfiniteScrollList(),
+      home: Scaffold(
+        appBar: AppBar(title: const Text('Infinite Scrolling ListView (Static Data)')),
+        body: const InfiniteScrollList(),
+      ),
     );
   }
 }
@@ -31,11 +34,11 @@
   final List<String> items = [];
   final int itemsPerPage = 20;
   final List<String> staticData = [
-    "Hello Flutter",
-    "Hello Flutter",
-    "Hello Flutter",
-    "Hello Flutter",
-    "Hello Flutter",
+    'Hello Flutter',
+    'Hello Flutter',
+    'Hello Flutter',
+    'Hello Flutter',
+    'Hello Flutter',
   ];
 
   @override
@@ -46,7 +49,7 @@
 
   void _loadMoreData() {
     setState(() {
-      final newItems = List.generate(itemsPerPage, (i) {
+      final List<String> newItems = List.generate(itemsPerPage, (int i) {
         return staticData[i % staticData.length];
       });
       items.addAll(newItems);
@@ -55,27 +58,19 @@
 
   @override
   Widget build(BuildContext context) {
-    return MaterialApp(
-      home: Scaffold(
-        appBar: AppBar(
-          title: Text("Infinite Scrolling ListView (Static Data)"),
-        ),
-        body: NotificationListener<ScrollNotification>(
-          onNotification: (ScrollNotification scrollInfo) {
-            if (scrollInfo.metrics.pixels >=
-                scrollInfo.metrics.maxScrollExtent - 50) {
-              _loadMoreData();
-              return true;
-            }
-            return false;
-          },
-          child: ListView.builder(
-            itemCount: items.length,
-            itemBuilder: (context, index) {
-              return ListTile(title: Text(items[index]));
-            },
-          ),
-        ),
+    return NotificationListener<ScrollNotification>(
+      onNotification: (ScrollNotification scrollInfo) {
+        if (scrollInfo.metrics.pixels >= scrollInfo.metrics.maxScrollExtent - 50) {
+          _loadMoreData();
+          return true;
+        }
+        return false;
+      },
+      child: ListView.builder(
+        itemCount: items.length,
+        itemBuilder: (context, index) {
+          return ListTile(title: Text(items[index]));
+        },
       ),
     );
   }