Remove MSVC6 support.

Don't support this compiler any more, this allows to get rid of tons of
MSVC6-specific workarounds, in particular we can now use Bind() and natural
template functions calls in the library code.

Also remove MSVC6 project and solution files and don't generate them when
bakefile_gen is ran any more (removing the remaining occurrences of msvc6prj
from the bakefiles results in weird bake-time errors, so it's simpler to just
leave them there).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76532 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/docview.h

@@ -148,9 +148,7 @@ public:
     virtual bool AddView(wxView *view);
     virtual bool RemoveView(wxView *view);
 
-#ifndef __VISUALC6__
     wxViewVector GetViewsVector() const;
-#endif // !__VISUALC6__
 
     wxList& GetViews() { return m_documentViews; }
     const wxList& GetViews() const { return m_documentViews; }
@@ -480,10 +478,8 @@ public:
     wxView *GetAnyUsableView() const;
 
 
-#ifndef __VISUALC6__
     wxDocVector GetDocumentsVector() const;
     wxDocTemplateVector GetTemplatesVector() const;
-#endif // !__VISUALC6__
 
     wxList& GetDocuments() { return m_docs; }
     wxList& GetTemplates() { return m_templates; }
@@ -761,15 +757,6 @@ private:
 // otherwise we could simply typedef it
 // ----------------------------------------------------------------------------
 
-#ifdef __VISUALC6__
-    // "non dll-interface class 'wxDocChildFrameAny<>' used as base interface
-    // for dll-interface class 'wxDocChildFrame'" -- this is bogus as the
-    // template will be DLL-exported but only once it is used as base class
-    // here!
-    #pragma warning (push)
-    #pragma warning (disable:4275)
-#endif
-
 typedef wxDocChildFrameAny<wxFrame, wxFrame> wxDocChildFrameBase;
 
 class WXDLLIMPEXP_CORE wxDocChildFrame : public wxDocChildFrameBase
@@ -967,11 +954,6 @@ private:
     wxDECLARE_NO_COPY_CLASS(wxDocParentFrame);
 };
 
-#ifdef __VISUALC6__
-    // reenable warning 4275
-    #pragma warning (pop)
-#endif
-
 // ----------------------------------------------------------------------------
 // Provide simple default printing facilities
 // ----------------------------------------------------------------------------
@@ -1026,7 +1008,6 @@ enum
 };
 #endif // WXWIN_COMPATIBILITY_2_8
 
-#ifndef __VISUALC6__
 inline wxViewVector wxDocument::GetViewsVector() const
 {
     return m_documentViews.AsVector<wxView*>();
@@ -1041,7 +1022,6 @@ inline wxDocTemplateVector wxDocManager::GetTemplatesVector() const
 {
     return m_templates.AsVector<wxDocTemplate*>();
 }
-#endif // !__VISUALC6__
 
 #endif // wxUSE_DOC_VIEW_ARCHITECTURE