Remove setLaunchOptions from OneSignal header

* This was added to the OneSignalFramework header file to expose to wrappers.
* However, wrappers do not actually use this because they must initialize the SDK (not sufficient to only set launch options) so cold start click listeners can be triggered.
* Remove from header so it is not misleading, which suggests it is used.

iOS_SDK/OneSignalSDK/Source/OneSignalFramework.h

@@ -76,7 +76,6 @@ NS_SWIFT_NAME(login(externalId:token:));
 + (Class<OSNotifications>)Notifications NS_REFINED_FOR_SWIFT;
 
 #pragma mark Initialization
-+ (void)setLaunchOptions:(nullable NSDictionary*)newLaunchOptions; // meant for use by wrappers
 + (void)initialize:(nonnull NSString*)newAppId withLaunchOptions:(nullable NSDictionary*)launchOptions;
 + (void)setProvidesNotificationSettingsView:(BOOL)providesView;