Serial refactor (#11521)

keyboards/sirius/uni660/rev1/rev1.c

@@ -1,9 +1,5 @@
 #include "rev1.h"
 
-void uart_init(void) {
-    SERIAL_UART_INIT();
-}
-
 void led_init(void) {
     setPinOutput(D1); // Pin to green, set as output
     writePinHigh(D1); // Turn it off
@@ -17,7 +13,6 @@ void matrix_init_kb(void) {
     // put your keyboard start-up code here
     // runs once when the firmware starts up
     matrix_init_user();
-    uart_init();
     led_init();
 }