net: remove UsingTCPFastOpen() method from StreamSocket class

net/socket/ssl_client_socket_unittest.cc

Index: net/socket/ssl_client_socket_unittest.cc
diff --git a/net/socket/ssl_client_socket_unittest.cc b/net/socket/ssl_client_socket_unittest.cc
index ba92459763e5bd7483d319e36d3aca76b708bc13..d5656567984ca31fafc4e872f5591fb60653113b 100644
--- a/net/socket/ssl_client_socket_unittest.cc
+++ b/net/socket/ssl_client_socket_unittest.cc
@@ -103,9 +103,6 @@ class WrappedStreamSocket : public StreamSocket {
   }
   void SetOmniboxSpeculation() override { transport_->SetOmniboxSpeculation(); }
   bool WasEverUsed() const override { return transport_->WasEverUsed(); }
-  bool UsingTCPFastOpen() const override {
-    return transport_->UsingTCPFastOpen();
-  }
   bool WasNpnNegotiated() const override {
     return transport_->WasNpnNegotiated();
   }