Drop |languages| from {Format,Elide}Url* and IDNToUnicode

ios/chrome/browser/interstitials/ios_security_interstitial_page.mm

Index: ios/chrome/browser/interstitials/ios_security_interstitial_page.mm
diff --git a/ios/chrome/browser/interstitials/ios_security_interstitial_page.mm b/ios/chrome/browser/interstitials/ios_security_interstitial_page.mm
index 946fc9d0778f81c11c32303d6403215bec94feb2..79d79be86c6479bfc9fd6916b2f8981e77bda738 100644
--- a/ios/chrome/browser/interstitials/ios_security_interstitial_page.mm
+++ b/ios/chrome/browser/interstitials/ios_security_interstitial_page.mm
@@ -53,12 +53,8 @@ std::string IOSSecurityInterstitialPage::GetHtmlContents() const {
 }
 
 base::string16 IOSSecurityInterstitialPage::GetFormattedHostName() const {
-  ios::ChromeBrowserState* browser_state =
-      ios::ChromeBrowserState::FromBrowserState(web_state_->GetBrowserState());
-  std::string languages =
-      browser_state->GetPrefs()->GetString(prefs::kAcceptLanguages);
   return security_interstitials::common_string_util::GetFormattedHostName(
-      request_url_, languages);
+      request_url_);
 }
 
 bool IOSSecurityInterstitialPage::IsPrefEnabled(const char* pref_name) const {