make FlutterProject synchronous (#31757)

diff --git a/packages/flutter_tools/test/ios/cocoapods_test.dart b/packages/flutter_tools/test/ios/cocoapods_test.dart
index 9bb1963..9baa6db 100644
--- a/packages/flutter_tools/test/ios/cocoapods_test.dart
+++ b/packages/flutter_tools/test/ios/cocoapods_test.dart
@@ -57,7 +57,7 @@
     fs = MemoryFileSystem();
     mockProcessManager = MockProcessManager();
     mockXcodeProjectInterpreter = MockXcodeProjectInterpreter();
-    projectUnderTest = await FlutterProject.fromDirectory(fs.directory('project'));
+    projectUnderTest = FlutterProject.fromDirectory(fs.directory('project'));
     projectUnderTest.ios.xcodeProject.createSync(recursive: true);
     cocoaPodsUnderTest = CocoaPods();
     pretendPodVersionIs('1.5.0');
@@ -156,7 +156,7 @@
         'SWIFT_VERSION': '4.0',
       });
 
-      final FlutterProject project = await FlutterProject.fromPath('project');
+      final FlutterProject project = FlutterProject.fromPath('project');
       cocoaPodsUnderTest.setupPodfile(project.ios);
 
       expect(projectUnderTest.ios.podfile.readAsStringSync(), 'Swift podfile template');
@@ -168,7 +168,7 @@
     testUsingContext('does not recreate Podfile when already present', () async {
       projectUnderTest.ios.podfile..createSync()..writeAsStringSync('Existing Podfile');
 
-      final FlutterProject project = await FlutterProject.fromPath('project');
+      final FlutterProject project = FlutterProject.fromPath('project');
       cocoaPodsUnderTest.setupPodfile(project.ios);
 
       expect(projectUnderTest.ios.podfile.readAsStringSync(), 'Existing Podfile');
@@ -179,7 +179,7 @@
     testUsingContext('does not create Podfile when we cannot interpret Xcode projects', () async {
       when(mockXcodeProjectInterpreter.isInstalled).thenReturn(false);
 
-      final FlutterProject project = await FlutterProject.fromPath('project');
+      final FlutterProject project = FlutterProject.fromPath('project');
       cocoaPodsUnderTest.setupPodfile(project.ios);
 
       expect(projectUnderTest.ios.podfile.existsSync(), false);
@@ -197,7 +197,7 @@
         ..createSync(recursive: true)
         ..writeAsStringSync('Existing release config');
 
-      final FlutterProject project = await FlutterProject.fromPath('project');
+      final FlutterProject project = FlutterProject.fromPath('project');
       cocoaPodsUnderTest.setupPodfile(project.ios);
 
       final String debugContents = projectUnderTest.ios.xcodeConfigFor('Debug').readAsStringSync();
@@ -225,7 +225,7 @@
         ..createSync(recursive: true)
         ..writeAsStringSync('Existing release config');
 
-      final FlutterProject project = await FlutterProject.fromPath('project');
+      final FlutterProject project = FlutterProject.fromPath('project');
       await injectPlugins(project);
 
       final String debugContents = projectUnderTest.ios.xcodeConfigFor('Debug').readAsStringSync();