Removed autofill::ContentAutofillDriver::autofill_external_delegate.

Function isn't used.

Change-Id: I8124be0ede96845bcc143d625d33690292ef4d30
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1823838Reviewed-by: Vadym Doroshenko <dvadym@chromium.org>
Commit-Queue: Christoph Schwering <schwering@google.com>
Cr-Commit-Position: refs/heads/master@{#699726}

components/autofill/content/browser/content_autofill_driver.h

@@ -7,6 +7,7 @@
 
 #include <memory>
 #include <string>
+#include <vector>
 
 #include "base/supports_user_data.h"
 #include "build/build_config.h"
@@ -24,7 +25,7 @@
 namespace content {
 class NavigationHandle;
 class RenderFrameHost;
-}
+}  // namespace content
 
 namespace autofill {
 
@@ -120,10 +121,6 @@ class ContentAutofillDriver : public AutofillDriver,
   // subframe navigations. See navigation_handle.h for details.
   void DidNavigateMainFrame(content::NavigationHandle* navigation_handle);
 
-  AutofillExternalDelegate* autofill_external_delegate() {
-    return autofill_external_delegate_.get();
-  }
-
   AutofillManager* autofill_manager() { return autofill_manager_; }
   AutofillHandler* autofill_handler() { return autofill_handler_.get(); }
   content::RenderFrameHost* render_frame_host() { return render_frame_host_; }