update comments (#11968)

Author: themiswang

Crashlytics/Crashlytics/Components/FIRCLSApplication.h

@@ -44,6 +44,8 @@ NSString* FIRCLSApplicationGetSDKBundleID(void);
 /**
  * Returns the platform identifier, either: ios, mac, or tvos.
  * Catalyst apps are treated as mac.
+ * This is a legacy function, for platform identificaiton please use
+ * FIRCLSApplicationGetFirebasePlatform.
  */
 NSString* FIRCLSApplicationGetPlatform(void);
 

Crashlytics/Crashlytics/Components/FIRCLSApplication.m

@@ -37,6 +37,8 @@
       [@"com.google.firebase.crashlytics." stringByAppendingString:FIRCLSApplicationGetPlatform()];
 }
 
+// Legacy function, we use FIRCLSApplicationGetFirebasePlatform now for platform specification.
+// Can't clean the code since some endpoints setup depend on this function.
 NSString* FIRCLSApplicationGetPlatform(void) {
 #if defined(TARGET_OS_MACCATALYST) && TARGET_OS_MACCATALYST
   return @"mac";
@@ -47,9 +49,9 @@
 #elif TARGET_OS_TV
   return @"tvos";
 #elif TARGET_OS_WATCH
-  return @"ios";  // TODO: temporarily use iOS until Firebase can add watchos to the backend
+  return @"ios";
 #elif defined(TARGET_OS_VISION) && TARGET_OS_VISION
-  return @"ios";  // TODO: temporarily use iOS until Firebase can add visionos to the backend
+  return @"ios";
 #endif
 }