remove unnecessary impl error:Error impl from lib

Author: sanket1729

src/descriptor/mod.rs

@@ -268,15 +268,7 @@ impl fmt::Display for DescriptorKeyParseError {
     }
 }
 
-impl error::Error for DescriptorKeyParseError {
-    fn description(&self) -> &str {
-        ""
-    }
-
-    fn cause(&self) -> Option<&error::Error> {
-        None
-    }
-}
+impl error::Error for DescriptorKeyParseError {}
 
 impl fmt::Display for DescriptorPublicKey {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {

src/interpreter/error.rs

@@ -101,9 +101,6 @@ impl From<::Error> for Error {
 }
 
 impl error::Error for Error {
-    fn description(&self) -> &str {
-        ""
-    }
     fn cause(&self) -> Option<&error::Error> {
         match *self {
             Error::Secp(ref err) => Some(err),

src/lib.rs

@@ -428,10 +428,6 @@ impl error::Error for Error {
             _ => None,
         }
     }
-
-    fn description(&self) -> &str {
-        ""
-    }
 }
 
 // https://github.com/sipa/miniscript/pull/5 for discussion on this number

src/miniscript/analyzable.rs

@@ -65,14 +65,7 @@ impl fmt::Display for AnalysisError {
     }
 }
 
-impl error::Error for AnalysisError {
-    fn description(&self) -> &str {
-        ""
-    }
-    fn cause(&self) -> Option<&error::Error> {
-        None
-    }
-}
+impl error::Error for AnalysisError {}
 
 impl<Pk: MiniscriptKey, Ctx: ScriptContext> Miniscript<Pk, Ctx> {
     /// Whether all spend paths of miniscript require a signature

src/policy/compiler.rs

@@ -62,15 +62,7 @@ pub enum CompilerError {
     PolicyError(policy::concrete::PolicyError),
 }
 
-impl error::Error for CompilerError {
-    fn cause(&self) -> Option<&error::Error> {
-        None
-    }
-
-    fn description(&self) -> &str {
-        ""
-    }
-}
+impl error::Error for CompilerError {}
 
 impl fmt::Display for CompilerError {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {

src/policy/concrete.rs

@@ -93,14 +93,7 @@ pub enum PolicyError {
     DuplicatePubKeys,
 }
 
-impl error::Error for PolicyError {
-    fn description(&self) -> &str {
-        ""
-    }
-    fn cause(&self) -> Option<&error::Error> {
-        None
-    }
-}
+impl error::Error for PolicyError {}
 
 impl fmt::Display for PolicyError {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {

src/psbt/mod.rs

@@ -183,15 +183,7 @@ impl From<bitcoin::util::key::Error> for InputError {
     }
 }
 
-impl error::Error for Error {
-    fn cause(&self) -> Option<&error::Error> {
-        None
-    }
-
-    fn description(&self) -> &str {
-        ""
-    }
-}
+impl error::Error for Error {}
 
 impl fmt::Display for Error {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {