Remove use_modular_headers from Podfiles using libraries (#42872)

* Remove use_modular_headers from Podfiles using libraries

* Remove @imports

dev/integration_tests/android_views/ios/Podfile

@@ -33,8 +33,6 @@ def parse_KV_file(file, separator='=')
 end
 
 target 'Runner' do
-  use_modular_headers!
-  
   # Flutter Pod
 
   copied_flutter_dir = File.join(__dir__, 'Flutter')

dev/integration_tests/ios_add2app/Podfile

@@ -5,7 +5,6 @@ flutter_application_path = 'flutterapp/'
 load File.join(flutter_application_path, '.ios', 'Flutter', 'podhelper.rb')
 
 target 'ios_add2app' do
-  use_modular_headers!
   install_all_flutter_pods(flutter_application_path)
 end
 

dev/integration_tests/ios_host_app/Host/ViewController.m

 #import "ViewController.h"
-
-@import Flutter;
-@import FlutterPluginRegistrant;
-
-// Prove plugins can be module-imported from the host app.
-@import device_info;
-@import google_maps_flutter;
+#import <Flutter/Flutter.h>
+#import <FlutterPluginRegistrant/GeneratedPluginRegistrant.h>
 
 @implementation ViewController
 

dev/integration_tests/ios_host_app/Podfile

@@ -4,6 +4,5 @@ flutter_application_path = '../hello'
 load File.join(flutter_application_path, '.ios', 'Flutter', 'podhelper.rb')
 
 target 'Host' do
-  use_modular_headers!
   install_all_flutter_pods flutter_application_path
 end

dev/integration_tests/ios_host_app_swift/Podfile

@@ -4,6 +4,5 @@ flutter_application_path = '../hello'
 load File.join(flutter_application_path, '.ios', 'Flutter', 'podhelper.rb')
 
 target 'Host' do
-  use_modular_headers!
   install_all_flutter_pods flutter_application_path
 end

dev/integration_tests/release_smoke_test/ios/Podfile

@@ -33,8 +33,6 @@ def parse_KV_file(file, separator='=')
 end
 
 target 'Runner' do
-  use_modular_headers!
-  
   # Flutter Pod
 
   copied_flutter_dir = File.join(__dir__, 'Flutter')

examples/flutter_gallery/ios/Podfile

@@ -33,8 +33,6 @@ def parse_KV_file(file, separator='=')
 end
 
 target 'Runner' do
-  use_modular_headers!
-  
   # Flutter Pod
 
   copied_flutter_dir = File.join(__dir__, 'Flutter')

examples/platform_view/ios/Podfile

@@ -33,8 +33,6 @@ def parse_KV_file(file, separator='=')
 end
 
 target 'Runner' do
-  use_modular_headers!
-  
   # Flutter Pod
 
   copied_flutter_dir = File.join(__dir__, 'Flutter')

packages/flutter_tools/templates/cocoapods/Podfile-ios-objc

@@ -33,8 +33,6 @@ def parse_KV_file(file, separator='=')
 end
 
 target 'Runner' do
-  use_modular_headers!
-  
   # Flutter Pod
 
   copied_flutter_dir = File.join(__dir__, 'Flutter')

packages/flutter_tools/templates/module/ios/host_app_ephemeral_cocoapods/Podfile.copy.tmpl

@@ -6,8 +6,6 @@ load File.join(flutter_application_path, '.ios', 'Flutter', 'podhelper.rb')
 use_frameworks!
 
 target 'Runner' do
-  use_modular_headers!
-  
   install_flutter_engine_pod
   install_flutter_plugin_pods flutter_application_path
 end