[Keyboard] Missed a JTAG disable (#6667)

keyboards/atomic/atomic.c

@@ -4,9 +4,6 @@ void matrix_init_kb(void) {
     // put your keyboard start-up code here
     // runs once when the firmware starts up
 
-    MCUCR |= (1<<JTD);
-    MCUCR |= (1<<JTD);
-
     // Turn status LED on
     DDRE |= (1<<6);
     PORTE |= (1<<6);