feat(uart_ci): reverting the wokwi patch, once it didn't make any difference

Author: SuGlider

tests/validation/uart/uart.ino

@@ -54,9 +54,7 @@ public:
 
   void begin(unsigned long baudrate) {  
     // pinMode will force enabing the internal pullup resistor (IDF 5.3.2 Change)
-  #ifdef ESP32 // Wokwi won't define it, therefore, it will ignore this line and pass Wokwi ESP32 CI
     pinMode(default_rx_pin, INPUT_PULLUP);
-  #endif
     serial.begin(baudrate, SERIAL_8N1, default_rx_pin, default_tx_pin);
     while (!serial) {
       delay(10);