net: remove UsingTCPFastOpen() method from StreamSocket class

net/socket/ssl_server_socket_openssl.cc

Index: net/socket/ssl_server_socket_openssl.cc
diff --git a/net/socket/ssl_server_socket_openssl.cc b/net/socket/ssl_server_socket_openssl.cc
index e98868e97c8520484fdb6a10eefbc22a9c3f3166..74f223131d87b04652b524bc57eb681f590d1098 100644
--- a/net/socket/ssl_server_socket_openssl.cc
+++ b/net/socket/ssl_server_socket_openssl.cc
@@ -89,7 +89,6 @@ class SSLServerSocketOpenSSL : public SSLServerSocket {
   void SetSubresourceSpeculation() override;
   void SetOmniboxSpeculation() override;
   bool WasEverUsed() const override;
-  bool UsingTCPFastOpen() const override;
   bool WasNpnNegotiated() const override;
   NextProto GetNegotiatedProtocol() const override;
   bool GetSSLInfo(SSLInfo* ssl_info) override;
@@ -353,10 +352,6 @@ bool SSLServerSocketOpenSSL::WasEverUsed() const {
   return transport_socket_->WasEverUsed();
 }
 
-bool SSLServerSocketOpenSSL::UsingTCPFastOpen() const {
-  return transport_socket_->UsingTCPFastOpen();
-}
-
 bool SSLServerSocketOpenSSL::WasNpnNegotiated() const {
   NOTIMPLEMENTED();
   return false;