feat: Remove trackingID from iOS (#1775)

* feat: Remove trackingID from iOS

* feat: Remove trackingID from iOS

---------

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>

Author: ncooke3

app/src/app_ios.mm

@@ -71,10 +71,6 @@ static void PlatformOptionsToAppOptions(FIROptions* platform_options, AppOptions
     const char* value = platform_options.databaseURL.UTF8String;
     if (value) app_options->set_database_url(value);
   }
-  if (!strlen(app_options->ga_tracking_id())) {
-    const char* value = platform_options.trackingID.UTF8String;
-    if (value) app_options->set_ga_tracking_id(value);
-  }
   if (!strlen(app_options->storage_bucket())) {
     const char* value = platform_options.storageBucket.UTF8String;
     if (value) app_options->set_storage_bucket(value);
@@ -107,9 +103,6 @@ static void PlatformOptionsToAppOptions(FIROptions* platform_options, AppOptions
   if (strlen(app_options.database_url())) {
     platform_options.databaseURL = @(app_options.database_url());
   }
-  if (strlen(app_options.ga_tracking_id())) {
-    platform_options.trackingID = @(app_options.ga_tracking_id());
-  }
   if (strlen(app_options.storage_bucket())) {
     platform_options.storageBucket = @(app_options.storage_bucket());
   }

app/tests/app_test.cc

@@ -207,11 +207,13 @@ TEST_F(AppTest, TestSetDatabaseUrl) {
   EXPECT_STREQ("http://abc-xyz-123.firebaseio.com", options.database_url());
 }
 
+#ifndef __APPLE__
 TEST_F(AppTest, TestSetGaTrackingId) {
   AppOptions options;
   options.set_ga_tracking_id("UA-12345678-1");
   EXPECT_STREQ("UA-12345678-1", options.ga_tracking_id());
 }
+#endif  // __APPLE__
 
 TEST_F(AppTest, TestSetStorageBucket) {
   AppOptions options;
@@ -241,10 +243,12 @@ TEST_F(AppTest, LoadDefault) {
   EXPECT_STREQ("fake messaging sender id from resource",
                options.messaging_sender_id());
   EXPECT_STREQ("fake database url from resource", options.database_url());
+#ifndef __APPLE__
 #if FIREBASE_PLATFORM_IOS || FIREBASE_PLATFORM_TVOS
   // GA tracking ID can currently only be configured on iOS.
   EXPECT_STREQ("fake ga tracking id from resource", options.ga_tracking_id());
 #endif  // FIREBASE_PLATFORM_IOS
+#endif  // __APPLE__
   EXPECT_STREQ("fake storage bucket from resource", options.storage_bucket());
   EXPECT_STREQ("fake project id from resource", options.project_id());
 #if !FIREBASE_PLATFORM_IOS