Remove wxOSX/Carbon support.

Cocoa has been the default toolkit in wxWidgets for a long time. There is really no good reason to use Carbon in 2016 and this removes a lot of unused and unmaintained code.

interface/wx/app.h

@@ -1000,8 +1000,7 @@ public:
     virtual void MacNewFile();
 
     /**
-        Called in response of an openFiles message with Cocoa, or an
-        "open-document" Apple event with Carbon.
+        Called in response of an openFiles message.
 
         You need to override this method in order to open one or more document
         files after the user double clicked on it or if the files and/or

interface/wx/button.h

@@ -85,11 +85,7 @@
         bitmap but uses a standard id would display a label too.
     @style{wxBORDER_NONE}
         Creates a button without border. This is currently implemented in MSW,
-        GTK2 and OSX/Cocoa and OSX/Carbon ports but in the latter only applies
-        to buttons with bitmaps and using bitmap of one of the standard sizes
-        only, namely 128*128, 48*48, 24*24 or 16*16. In all the other cases
-        wxBORDER_NONE is ignored under OSX/Carbon (these restrictions don't
-        exist in OSX/Cocoa however).
+        GTK2 and OSX/Cocoa.
     @endStyleTable
 
     @beginEventEmissionTable{wxCommandEvent}

interface/wx/dataview.h

@@ -182,9 +182,6 @@ public:
         @return
             @true if this item should be enabled, @false otherwise.
 
-        @note Currently disabling items is not supported by the wxOSX/Carbon
-              implementation.
-
         @since 2.9.2
     */
     virtual bool IsEnabled(const wxDataViewItem &item,
@@ -1274,8 +1271,6 @@ public:
 
         Doesn't do anything if the item or this column is not editable.
 
-        @note Currently not implemented in wxOSX/Carbon.
-
         @since 2.9.4
     */
     virtual void EditItem(const wxDataViewItem& item, const wxDataViewColumn *column);

interface/wx/msgdlg.h

@@ -31,8 +31,8 @@ const char wxMessageBoxCaptionStr[] = "Message";
         Puts a Help button to the message box. This button can have special
         appearance or be specially positioned if its label is not changed from
         the default one. Notice that using this button is not supported when
-        showing a message box from non-main thread in wxOSX/Cocoa and it is not
-        supported in wxOSX/Carbon at all. Available since wxWidgets 2.9.3.
+        showing a message box from non-main thread in wxOSX/Cocoa.
+        Available since wxWidgets 2.9.3.
     @style{wxNO_DEFAULT}
         Makes the "No" button default, can only be used with @c wxYES_NO.
     @style{wxCANCEL_DEFAULT}

interface/wx/textctrl.h

@@ -1279,7 +1279,7 @@ public:
         The returned number is the number of logical lines, i.e. just the count
         of the number of newline characters in the control + 1, for wxGTK and
         wxOSX/Cocoa ports while it is the number of physical lines, i.e. the
-        count of lines actually shown in the control, in wxMSW and wxOSX/Carbon.
+        count of lines actually shown in the control, in wxMSW.
         Because of this discrepancy, it is not recommended to use this function.
 
         @remarks

interface/wx/window.h

@@ -588,7 +588,7 @@ public:
         @param vflag
             Whether the vertical scroll bar should always be visible.
 
-        @remarks This function is currently only implemented under Mac/Carbon.
+        @remarks This function is currently not implemented.
     */
     virtual void AlwaysShowScrollbars(bool hflag = true, bool vflag = true);
 
@@ -2750,9 +2750,7 @@ public:
             animation time for the current platform is used.
 
         @note Currently this function is only implemented in wxMSW and wxOSX
-              (for wxTopLevelWindows only in Carbon version and for any kind of
-              windows in Cocoa) and does the same thing as Show() in the other
-              ports.
+              and does the same thing as Show() in the other ports.
 
         @since 2.9.0