Remove ATECC crypto chip placeholder code (#5461)

src/main.cpp

@@ -150,10 +150,6 @@ ScanI2C::DeviceAddress accelerometer_found = ScanI2C::ADDRESS_NONE;
 // The I2C address of the RGB LED (if found)
 ScanI2C::FoundDevice rgb_found = ScanI2C::FoundDevice(ScanI2C::DeviceType::NONE, ScanI2C::ADDRESS_NONE);
 
-#if !defined(ARCH_PORTDUINO) && !defined(ARCH_STM32WL)
-ATECCX08A atecc;
-#endif
-
 #ifdef T_WATCH_S3
 Adafruit_DRV2605 drv;
 #endif