Don't document obsolete wxHelpController::Initialize() overload

There are no help controllers using the TCP port number passed to this
Initialize() overload anyhow, so don't document it neither.

It would be even better to get rid of it entirely, but this would require
slightly more effort.

See #17566.

interface/wx/help.h

@@ -140,10 +140,10 @@ public:
     */
     virtual wxWindow* GetParentWindow() const;
 
-    //@{
     /**
-        Initializes the help instance with a help filename, and optionally a server
-        socket number if using wxHelp (now obsolete). Does not invoke the help viewer.
+        Initializes the help instance with a help filename.
+
+        Does not invoke the help viewer.
         This must be called directly after the help instance object is created and
         before any attempts to communicate with the viewer.
 
@@ -152,8 +152,6 @@ public:
         while searching for a suitable file. For WinHelp, the hlp extension is appended.
     */
     virtual bool Initialize(const wxString& file);
-    virtual bool Initialize(const wxString& file, int server);
-    //@}
 
     /**
         If the help viewer is not running, runs it, and searches for sections matching