Clean up save_failed_screen

src/save.c

@@ -23,10 +23,6 @@ static u8 HandleWriteSector(u16 a1, const struct SaveSectionLocation *location);
 
 // Divide save blocks into individual chunks to be written to flash sectors
 
-// Each 4 KiB flash sector contains 3968 bytes of actual data followed by a 128 byte footer
-#define SECTOR_DATA_SIZE 3968
-#define SECTOR_FOOTER_SIZE 128
-
 /*
  * Sector Layout:
  *