Revert of ChromeWebView integration test for Incognito.

ios/web_view/test/web_view_test_util.mm

Index: ios/web_view/test/web_view_test_util.mm
diff --git a/ios/web_view/test/web_view_test_util.mm b/ios/web_view/test/web_view_test_util.mm
index 79cf7be898db17bd24c5ff87ed2680bc0d94d39e..f2538708a581a572e074e5983d96fbf18e70d594 100644
--- a/ios/web_view/test/web_view_test_util.mm
+++ b/ios/web_view/test/web_view_test_util.mm
@@ -17,13 +17,10 @@
 namespace ios_web_view {
 namespace test {
 
-CWVWebView* CreateWebView(CWVWebViewConfiguration* configuration) {
-  return [[CWVWebView alloc] initWithFrame:UIScreen.mainScreen.bounds
-                             configuration:configuration];
-}
-
 CWVWebView* CreateWebView() {
-  return CreateWebView([CWVWebViewConfiguration defaultConfiguration]);
+  return [[CWVWebView alloc]
+      initWithFrame:UIScreen.mainScreen.bounds
+      configuration:[CWVWebViewConfiguration defaultConfiguration]];
 }
 
 bool LoadUrl(CWVWebView* web_view, NSURL* url) {