remove unused warning

Author: d-a-v

examples/BarometricPressureWebServer/BarometricPressureWebServer.ino

@@ -228,7 +228,7 @@ unsigned int readRegister(byte registerName, int numBytes) {
   // take the chip select low to select the device:
   digitalWrite(chipSelectPin, LOW);
   // send the device the register you want to read:
-  int command = SPI.transfer(registerName);
+  /*int command =*/ SPI.transfer(registerName);
   // send a value of 0 to read the first byte returned:
   inByte = SPI.transfer(0x00);