Revert of Use IOSImageDataFetcherWrapper for favicon

components/favicon/ios/web_favicon_driver.h

Index: components/favicon/ios/web_favicon_driver.h
diff --git a/components/favicon/ios/web_favicon_driver.h b/components/favicon/ios/web_favicon_driver.h
index 59cfca2e2d074931cee773c3cdc780679366205a..b5209a1b7a0a5067db20c93bb3e054ad3e18fcef 100644
--- a/components/favicon/ios/web_favicon_driver.h
+++ b/components/favicon/ios/web_favicon_driver.h
@@ -7,7 +7,6 @@
 
 #include "base/macros.h"
 #include "components/favicon/core/favicon_driver_impl.h"
-#import "components/image_fetcher/ios/ios_image_data_fetcher_wrapper.h"
 #include "ios/web/public/web_state/web_state_observer.h"
 #include "ios/web/public/web_state/web_state_user_data.h"
 
@@ -59,9 +58,6 @@
   // The URL passed to FetchFavicon().
   GURL fetch_favicon_url_;
 
-  // Image Fetcher used to fetch favicon.
-  image_fetcher::IOSImageDataFetcherWrapper image_fetcher_;
-
   DISALLOW_COPY_AND_ASSIGN(WebFaviconDriver);
 };