RMT S2 pin typo + clean forgotten comments

Author: JurajSadel

hil-test/tests/rmt.rs

@@ -68,7 +68,7 @@ mod tests {
             } else if #[cfg(feature = "esp32s2")] {
                     let  rx_channel = {
                         use esp_hal::rmt::RxChannelCreator;
-                        rmt.channel1.configure(io.pins.gpio3, rx_config).unwrap()
+                        rmt.channel1.configure(rx, rx_config).unwrap()
                     };
             } else if #[cfg(feature = "esp32s3")] {
                 let  rx_channel = {