Revert "Add option to enable a more readable deck, suggestion by @Turro75 (#495)" (#510)

This reverts commit d3c0357856.

include/card.h

@@ -40,10 +40,6 @@
 
 #define IMPOSSIBLY_HIGH_CARD_VALUE 100
 
-// Card sprites
-#define DEFAULT_HIGH_CONTRAST false
-#define DEFAULT_MORE_READABLE false
-
 // Card types
 typedef struct Card
 {
@@ -58,11 +54,9 @@ typedef struct CardObject
     bool selected;
 } CardObject;
 
-// Card sprites accessibility functions
-void set_cards_high_contrast(bool enable);
-void set_cards_more_readable(bool enable);
-bool get_cards_high_contrast(void);
-bool get_cards_more_readable(void);
+// Card functions
+void card_init();
+void toggle_high_contrast_cards(bool enable);
 
 // Card methods
 Card* card_new(u8 suit, u8 rank);