Remove the unused crate::Error

The `crate::Error` type is now unused, remove it.

bitcoin/src/error.rs

@@ -2,46 +2,8 @@
 
 //! Contains error types and other error handling tools.
 
-use core::fmt;
-
-use internals::write_err;
-
-use crate::consensus::encode;
 pub use crate::parse::ParseIntError;
 
-/// A general error code, other errors should implement conversions to/from this
-/// if appropriate.
-#[derive(Debug)]
-#[non_exhaustive]
-pub enum Error {
-    /// Encoding error
-    Encode(encode::Error),
-}
-
-impl fmt::Display for Error {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        match *self {
-            Error::Encode(ref e) => write_err!(f, "encoding error"; e),
-        }
-    }
-}
-
-#[cfg(feature = "std")]
-impl std::error::Error for Error {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
-        use self::Error::*;
-
-        match self {
-            Encode(e) => Some(e),
-        }
-    }
-}
-
-#[doc(hidden)]
-impl From<encode::Error> for Error {
-    fn from(e: encode::Error) -> Error { Error::Encode(e) }
-}
-
 /// Impls std::error::Error for the specified type with appropriate attributes, possibly returning
 /// source.
 macro_rules! impl_std_error {

bitcoin/src/lib.rs

@@ -134,7 +134,6 @@ pub use crate::blockdata::{constants, opcodes};
 pub use crate::consensus::encode::VarInt;
 pub use crate::crypto::key::{self, PrivateKey, PublicKey};
 pub use crate::crypto::{ecdsa, sighash};
-pub use crate::error::Error;
 pub use crate::hash_types::{
     BlockHash, PubkeyHash, ScriptHash, Txid, WPubkeyHash, WScriptHash, Wtxid,
 };