Cleanup AZTEEG_X5_GT pins for VIKI

What should the SD detect and SDSS pins be? Followup soon on #8138

Marlin/src/pins/pins_AZTEEG_X5_GT.h

@@ -101,9 +101,8 @@
   #define BTN_EN2          P3_26
   #define BTN_ENC          P2_11
 
-    #define SD_DETECT_PIN     -1   // Pin 49 for display sd interface, 72 for easy adapter board
-
-    #define KILL_PIN          -1
+  //#define SD_DETECT_PIN    P1_18
+  //#define SDSS             P1_21
 
   #define STAT_LED_RED_PIN P0_26
   #define STAT_LED_BLUE_PIN P1_21