Enable universal iOS binaries in templates (#17358)

Eliminates the restrictions to build in arm64 mode only in iOS project
templates created by flutter create.
diff --git a/packages/flutter_tools/templates/create/ios-objc.tmpl/Runner.xcodeproj/project.pbxproj.tmpl b/packages/flutter_tools/templates/create/ios-objc.tmpl/Runner.xcodeproj/project.pbxproj.tmpl
index 41e80d2..30edc23 100644
--- a/packages/flutter_tools/templates/create/ios-objc.tmpl/Runner.xcodeproj/project.pbxproj.tmpl
+++ b/packages/flutter_tools/templates/create/ios-objc.tmpl/Runner.xcodeproj/project.pbxproj.tmpl
@@ -369,7 +369,6 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 9740EEB21CF90195004384FC /* Debug.xcconfig */;
 			buildSettings = {
-				ARCHS = arm64;
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CURRENT_PROJECT_VERSION = 1;
 				ENABLE_BITCODE = NO;
@@ -393,7 +392,6 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 7AFA3C8E1D35360C0083082E /* Release.xcconfig */;
 			buildSettings = {
-				ARCHS = arm64;
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CURRENT_PROJECT_VERSION = 1;
 				ENABLE_BITCODE = NO;
diff --git a/packages/flutter_tools/templates/create/ios-swift.tmpl/Runner.xcodeproj/project.pbxproj.tmpl b/packages/flutter_tools/templates/create/ios-swift.tmpl/Runner.xcodeproj/project.pbxproj.tmpl
index 24449ff..2363bd5 100644
--- a/packages/flutter_tools/templates/create/ios-swift.tmpl/Runner.xcodeproj/project.pbxproj.tmpl
+++ b/packages/flutter_tools/templates/create/ios-swift.tmpl/Runner.xcodeproj/project.pbxproj.tmpl
@@ -366,7 +366,6 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 9740EEB21CF90195004384FC /* Debug.xcconfig */;
 			buildSettings = {
-				ARCHS = arm64;
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
 				CURRENT_PROJECT_VERSION = 1;
@@ -395,7 +394,6 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 7AFA3C8E1D35360C0083082E /* Release.xcconfig */;
 			buildSettings = {
-				ARCHS = arm64;
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
 				CURRENT_PROJECT_VERSION = 1;
diff --git a/packages/flutter_tools/templates/create/ios.tmpl/Flutter/AppFrameworkInfo.plist b/packages/flutter_tools/templates/create/ios.tmpl/Flutter/AppFrameworkInfo.plist
index 6c2de80..9367d48 100644
--- a/packages/flutter_tools/templates/create/ios.tmpl/Flutter/AppFrameworkInfo.plist
+++ b/packages/flutter_tools/templates/create/ios.tmpl/Flutter/AppFrameworkInfo.plist
@@ -20,10 +20,6 @@
   <string>????</string>
   <key>CFBundleVersion</key>
   <string>1.0</string>
-  <key>UIRequiredDeviceCapabilities</key>
-  <array>
-    <string>arm64</string>
-  </array>
   <key>MinimumOSVersion</key>
   <string>8.0</string>
 </dict>
diff --git a/packages/flutter_tools/templates/create/ios.tmpl/Runner/Info.plist.tmpl b/packages/flutter_tools/templates/create/ios.tmpl/Runner/Info.plist.tmpl
index 29ab1d4..5872326 100644
--- a/packages/flutter_tools/templates/create/ios.tmpl/Runner/Info.plist.tmpl
+++ b/packages/flutter_tools/templates/create/ios.tmpl/Runner/Info.plist.tmpl
@@ -26,10 +26,6 @@
 	<string>LaunchScreen</string>
 	<key>UIMainStoryboardFile</key>
 	<string>Main</string>
-	<key>UIRequiredDeviceCapabilities</key>
-	<array>
-		<string>arm64</string>
-	</array>
 	<key>UISupportedInterfaceOrientations</key>
 	<array>
 		<string>UIInterfaceOrientationPortrait</string>