TCPSocket: Remove deprecated contructor with open

Default constructor and separate open call should be used instead.

features/netsocket/TCPSocket.h

@@ -37,25 +37,6 @@ public:
      */
     TCPSocket();
 
-    /** Create a socket on a network interface
-     *
-     *  Creates and opens a socket on the network stack of the given
-     *  network interface.
-     *
-     *  @param stack    Network stack as target for socket
-     *
-     *  @deprecated since mbed-os-5.11
-     */
-    template <typename S>
-    MBED_DEPRECATED_SINCE("mbed-os-5.11",
-                          "The TCPSocket(S *stack) constructor is deprecated."
-                          "It discards the open() call return value."
-                          "Use another constructor and call open() explicitly, instead.")
-    TCPSocket(S *stack) : TCPSocket()
-    {
-        open(stack);
-    }
-
     /** Override multicast functions to return error for TCP
      *
      */