Remove support for the keygen tag

content/public/browser/content_browser_client.cc

Index: content/public/browser/content_browser_client.cc
diff --git a/content/public/browser/content_browser_client.cc b/content/public/browser/content_browser_client.cc
index 6d8fb21d8c529461d9b827cef1a32886460a6124..c0b348d1e75ccb06157e898f6741fb78a8d0192e 100644
--- a/content/public/browser/content_browser_client.cc
+++ b/content/public/browser/content_browser_client.cc
@@ -212,11 +212,6 @@ bool ContentBrowserClient::AllowWebRTCIdentityCache(const GURL& url,
 }
 #endif  // BUILDFLAG(ENABLE_WEBRTC)
 
-bool ContentBrowserClient::AllowKeygen(const GURL& url,
-                                       content::ResourceContext* context) {
-  return true;
-}
-
 ContentBrowserClient::AllowWebBluetoothResult
 ContentBrowserClient::AllowWebBluetooth(
     content::BrowserContext* browser_context,