Remove SPI ErrorKind::Crc variant

Author: eldruin

src/spi/mod.rs

@@ -76,8 +76,6 @@ pub enum ErrorKind {
     Overrun,
     /// Multiple devices on the SPI bus are trying to drive the slave select pin, e.g. in a multi-master setup
     ModeFault,
-    /// CRC does not match the received data
-    Crc,
     /// Received data does not conform to the peripheral configuration
     FrameFormat,
     /// A different error occurred. The original error may contain more information.