Remove unused ability to disable flow control in QUIC

net/quic/quic_flow_controller.h

Index: net/quic/quic_flow_controller.h
diff --git a/net/quic/quic_flow_controller.h b/net/quic/quic_flow_controller.h
index 371b8c9242b44d0a2bbf7a68909e0f82b12fe085..1b5ed613e0ae3bd51a570785ace81f58b6a5f14c 100644
--- a/net/quic/quic_flow_controller.h
+++ b/net/quic/quic_flow_controller.h
@@ -56,12 +56,6 @@ class NET_EXPORT_PRIVATE QuicFlowController {
   // Send a BLOCKED frame if appropriate.
   void MaybeSendBlocked();
 
-  // Disable flow control.
-  void Disable();
-
-  // Returns true if flow control is enabled.
-  bool IsEnabled() const;
-
   // Returns true if flow control send limits have been reached.
   bool IsBlocked() const;
 
@@ -89,9 +83,6 @@ class NET_EXPORT_PRIVATE QuicFlowController {
   // connection level flow controller.
   QuicStreamId id_;
 
-  // True if flow control is enabled.
-  bool is_enabled_;
-
   // True if this is owned by a server.
   bool is_server_;