remove WXWIN_COMPATIBILITY_2_6, add WXWIN_COMPATIBILITY_3_0

closes #15792

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@75532 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/zipstrm.h

@@ -362,11 +362,6 @@ public:
     wxZipInputStream(wxInputStream& stream, wxMBConv& conv = wxConvLocal);
     wxZipInputStream(wxInputStream *stream, wxMBConv& conv = wxConvLocal);
 
-#if WXWIN_COMPATIBILITY_2_6 && wxUSE_FFILE
-    wxZipInputStream(const wxString& archive, const wxString& file)
-     : wxArchiveInputStream(OpenFile(archive), wxConvLocal) { Init(file); }
-#endif
-
     virtual WXZIPFIX ~wxZipInputStream();
 
     bool OpenEntry(wxZipEntry& entry)   { return DoOpen(&entry); }
@@ -383,10 +378,6 @@ protected:
     size_t WXZIPFIX OnSysRead(void *buffer, size_t size);
     wxFileOffset OnSysTell() const { return m_decomp ? m_decomp->TellI() : 0; }
 
-#if WXWIN_COMPATIBILITY_2_6
-    wxFileOffset WXZIPFIX OnSysSeek(wxFileOffset seek, wxSeekMode mode);
-#endif
-
     // this protected interface isn't yet finalised
     virtual wxInputStream* WXZIPFIX OpenDecompressor(wxInputStream& stream);
     virtual bool WXZIPFIX CloseDecompressor(wxInputStream *decomp);
@@ -394,9 +385,6 @@ protected:
 private:
     void Init();
     void Init(const wxString& file);
-#if WXWIN_COMPATIBILITY_2_6 && wxUSE_FFILE
-    static wxInputStream *OpenFile(const wxString& archive);
-#endif
 
     wxArchiveEntry *DoGetNextEntry()    { return GetNextEntry(); }
 
@@ -440,11 +428,6 @@ private:
     friend bool wxZipOutputStream::CopyArchiveMetaData(
                     wxZipInputStream& inputStream);
 
-#if WXWIN_COMPATIBILITY_2_6
-    bool m_allowSeeking;
-    friend class wxArchiveFSHandler;
-#endif
-
     wxDECLARE_NO_COPY_CLASS(wxZipInputStream);
 };