Remove Unicode option support from wx-config and wxwin.m4

Keep the option itself, but hardcode its value.

wx-config.in

@@ -60,7 +60,8 @@ usage()
 
     NOTE:    Usage of --debug and --query-debugtype are only relevant if you
   have any  versions prior to 2.9 installed  and use the --version option to
-  select an earlier version.
+  select an earlier version.  Similarly, usage of --unicode is only relevant
+  if a version prior to 3.3 is used, as all later ones always use Unicode.
 
     If multiple builds of wxWidgets  are available,  you can use the options
   --prefix, --host, --toolkit,  --unicode, --static, --universal,  --version
@@ -144,6 +145,9 @@ wxconfig_input_options="prefix exec_prefix utility $wxconfig_schema"
 # Notice that this includes "debug" but it is done only for compatibility, this
 # options (i.e. --debug[=yes] or --debug=no) is completely ignored as there is
 # no distinction between debug and release builds in wx any more
+#
+# For "unicode", the situation is similar except that specifying --unicode=no
+# will always fail with this wxWidgets version.
 wxconfig_yesno_options="universal unicode debug static"
 
 # Boolean options that do something or not.
@@ -415,7 +419,7 @@ is_cross && target="@host_alias@"
 this_host="${target:+${target}}"
 this_toolkit="@TOOLKIT_DIR@@TOOLKIT_VERSION@"
 this_widgetset="@WIDGET_SET@"
-this_chartype="@WX_CHARTYPE@"
+this_chartype="unicode"
 this_debugtype="release"
 this_flavour="@WX_FLAVOUR@"
 this_version="@WX_RELEASE@"