Cleaned up unused methods from WebStateImpl and NavigationContextImpl.

ios/web/web_state/web_state_observer_bridge_unittest.mm

Index: ios/web/web_state/web_state_observer_bridge_unittest.mm
diff --git a/ios/web/web_state/web_state_observer_bridge_unittest.mm b/ios/web/web_state/web_state_observer_bridge_unittest.mm
index 1d5005c88f58142fde32e3df5590bbe26c6e553f..f84f155eccbbff5e2c84c2ac6daeb07ff23b905b 100644
--- a/ios/web/web_state/web_state_observer_bridge_unittest.mm
+++ b/ios/web/web_state/web_state_observer_bridge_unittest.mm
@@ -57,8 +57,8 @@ TEST_F(WebStateObserverBridgeTest, DidFinishNavigation) {
 
   GURL url("https://chromium.test/");
   std::unique_ptr<web::NavigationContext> context =
-      web::NavigationContextImpl::CreateNavigationContext(&test_web_state_, url,
-                                                          response_headers_);
+      web::NavigationContextImpl::CreateNavigationContext(&test_web_state_,
+                                                          url);
   bridge_->DidFinishNavigation(context.get());
 
   ASSERT_TRUE([observer_ didFinishNavigationInfo]);