patch 8.1.0810: too many #ifdefs

Problem:    Too many #ifdefs.
Solution:   Graduate FEAT_MBYTE, part 4.
diff --git a/src/gui.h b/src/gui.h
index 9ac5e07..a57b0a3 100644
--- a/src/gui.h
+++ b/src/gui.h
@@ -303,13 +303,11 @@
     GuiFont	menu_font;	    /* menu item font */
 # endif
 #endif
-#ifdef FEAT_MBYTE
     GuiFont	wide_font;	    /* Normal 'guifontwide' font */
-# ifndef FEAT_GUI_GTK
+#ifndef FEAT_GUI_GTK
     GuiFont	wide_bold_font;	    /* Bold 'guifontwide' font */
     GuiFont	wide_ital_font;	    /* Italic 'guifontwide' font */
     GuiFont	wide_boldital_font; /* Bold-Italic 'guifontwide' font */
-# endif
 #endif
 #ifdef FEAT_XFONTSET
     GuiFontset	fontset;	    /* set of fonts for multi-byte chars */