Eliminate calls to deprecated FlutterInit() (#7770)

dev/benchmarks/complex_layout/ios/Runner/main.m

@@ -6,7 +6,6 @@
 #import <Flutter/Flutter.h>
 
 int main(int argc, char * argv[]) {
-    FlutterInit(argc, (const char**)argv);
     @autoreleasepool {
         return UIApplicationMain(argc, argv, nil,
                                  NSStringFromClass([FlutterAppDelegate class]));

dev/benchmarks/microbenchmarks/ios/Runner/main.m

@@ -6,7 +6,6 @@
 #import <Flutter/Flutter.h>
 
 int main(int argc, char * argv[]) {
-    FlutterInit(argc, (const char**)argv);
     @autoreleasepool {
         return UIApplicationMain(argc, argv, nil,
                                  NSStringFromClass([FlutterAppDelegate class]));

examples/flutter_gallery/ios/Runner/main.m

@@ -7,7 +7,6 @@
 #import "AppDelegate.h"
 
 int main(int argc, char * argv[]) {
-    FlutterInit(argc, (const char**)argv);
     @autoreleasepool {
         return UIApplicationMain(argc, argv, nil,
                                  NSStringFromClass([AppDelegate class]));

examples/hello_services/ios/Runner/main.m

@@ -7,7 +7,6 @@
 #import "AppDelegate.h"
 
 int main(int argc, char * argv[]) {
-    FlutterInit(argc, (const char**)argv);
     @autoreleasepool {
         return UIApplicationMain(argc, argv, nil,
                                  NSStringFromClass([AppDelegate class]));

examples/hello_world/ios/Runner/main.m

@@ -7,7 +7,6 @@
 #import "AppDelegate.h"
 
 int main(int argc, char * argv[]) {
-    FlutterInit(argc, (const char**)argv);
     @autoreleasepool {
         return UIApplicationMain(argc, argv, nil,
                                  NSStringFromClass([AppDelegate class]));

examples/stocks/ios/Runner/main.m

@@ -7,7 +7,6 @@
 #import "AppDelegate.h"
 
 int main(int argc, char * argv[]) {
-    FlutterInit(argc, (const char**)argv);
     @autoreleasepool {
         return UIApplicationMain(argc, argv, nil,
                                  NSStringFromClass([AppDelegate class]));

packages/flutter_tools/templates/create/ios.tmpl/Runner/main.m

@@ -3,7 +3,6 @@
 #import "AppDelegate.h"
 
 int main(int argc, char * argv[]) {
-    FlutterInit(argc, (const char**)argv);
     @autoreleasepool {
         return UIApplicationMain(argc, argv, nil,
                                  NSStringFromClass([AppDelegate class]));