Reflowed comments and removed commented out code (#735)

wpilibc/src/main/native/cpp/I2C.cpp

@@ -150,17 +150,6 @@ bool I2C::ReadOnly(int count, uint8_t* buffer) {
   return HAL_ReadI2C(m_port, m_deviceAddress, buffer, count) < 0;
 }
 
-/**
- * Send a broadcast write to all devices on the I2C bus.
- *
- * This is not currently implemented!
- *
- * @param registerAddress The register to write on all devices on the bus.
- * @param data            The value to write to the devices.
- */
-// [[gnu::warning("I2C::Broadcast() is not implemented.")]] void I2C::Broadcast(
-//     int registerAddress, uint8_t data) {}
-
 /**
  * Verify that a device's registers contain expected values.
  *