Remove "HAVE_TRANSFLECTIVE_LCD" from iPod 6G config

The screen content is only poorly visible without backlight, it's not
really usable this way.
Removing HAVE_TRANSFLECTIVE_LCD also fixes the "flashing screen"
issue that appeared on some models when "lcd_awake()" is called.

Change-Id: I3ba954c944077a32016820462f782dc27a31f8d8
diff --git a/firmware/export/config/ipod6g.h b/firmware/export/config/ipod6g.h
index 665e1f9..b4be39d 100644
--- a/firmware/export/config/ipod6g.h
+++ b/firmware/export/config/ipod6g.h
@@ -59,9 +59,6 @@
 /* define this if you can invert the colours on your LCD */
 //#define HAVE_LCD_INVERT
 
-/* LCD stays visible without backlight - simulator hint */
-#define HAVE_TRANSFLECTIVE_LCD
-
 /* define this if you have access to the quickscreen */
 #define HAVE_QUICKSCREEN