Rejigger the SSHKey trait a little more cleanly.

src/ssh/errors.rs

@@ -1,11 +1,9 @@
 use base64::DecodeError;
-use simple_asn1::ASN1DecodeErr;
 use std::io;
 
 #[derive(Debug)]
 pub enum SSHKeyParseError
 {
-    ASN1Error(ASN1DecodeErr),
     DecodeError(DecodeError),
     IOError(io::Error),
     NoBeginBannerFound, NoEndBannerFound,
@@ -23,13 +21,6 @@ pub enum SSHKeyParseError
     InvalidPadding
 }
 
-impl From<ASN1DecodeErr> for SSHKeyParseError {
-    fn from(e: ASN1DecodeErr) -> SSHKeyParseError {
-        println!("asn1 error: {:?}", e);
-        SSHKeyParseError::ASN1Error(e)
-    }
-}
-
 impl From<DecodeError> for SSHKeyParseError {
     fn from(e: DecodeError) -> SSHKeyParseError {
         SSHKeyParseError::DecodeError(e)