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/compositewin.h

@@ -44,16 +44,6 @@ public:
 
     }
 
-#ifndef __VISUALC6__
-    // FIXME-VC6: This compiler can't compile DoSetForAllParts() template function,
-    // it can't determine whether the deduced type should be "T" or "const T&". And
-    // without this function wxCompositeWindow is pretty useless so simply disable
-    // this code for it, this does mean that setting colours/fonts/... for
-    // composite controls won't work in the library compiled with it but so far
-    // this only affects the generic wxDatePickerCtrl which is not used by default
-    // under MSW anyhow so it doesn't seem to be worth it to spend time and uglify
-    // the code to fix it.
-
     // Override all wxWindow methods which must be forwarded to the composite
     // window parts.
 
@@ -113,8 +103,6 @@ public:
     }
 #endif // wxUSE_TOOLTIPS
 
-#endif // !__VISUALC6__
-
     virtual void SetFocus()
     {
         wxSetFocusToChild(this, NULL);
@@ -190,7 +178,6 @@ private:
             event.Skip();
     }
 
-#ifndef __VISUALC6__
     template <class T>
     void SetForAllParts(bool (wxWindowBase::*func)(const T&), const T& arg)
     {
@@ -221,7 +208,6 @@ private:
                 (child->*func)(arg);
         }
     }
-#endif // !__VISUALC6__
 
     wxDECLARE_NO_COPY_TEMPLATE_CLASS(wxCompositeWindow, W);
 };