chore: fix clippy lints

psbt/src/coders.rs

@@ -185,7 +185,7 @@ pub trait Encode {
     fn encode(&self, writer: &mut dyn Write) -> Result<usize, IoError>;
 }
 
-impl<'a, T: Encode> Encode for &'a T {
+impl<T: Encode> Encode for &T {
     fn encode(&self, writer: &mut dyn Write) -> Result<usize, IoError> { (*self).encode(writer) }
 }
 
@@ -677,7 +677,7 @@ macro_rules! psbt_code_using_consensus {
 }
 
 struct WriteWrap<'a>(&'a mut dyn Write);
-impl<'a> Write for WriteWrap<'a> {
+impl Write for WriteWrap<'_> {
     fn write(&mut self, buf: &[u8]) -> io::Result<usize> { self.0.write(buf) }
     fn flush(&mut self) -> io::Result<()> { self.0.flush() }
 }

psbt/src/data.rs

@@ -1035,7 +1035,7 @@ impl Output {
         if terminal.len() != 1 {
             return None;
         }
-        return terminal.first().copied();
+        terminal.first().copied()
     }
 }
 

src/signers.rs

@@ -80,15 +80,15 @@ impl<'a> TestnetRefSigner<'a> {
     }
 }
 
-impl<'a> Signer for TestnetRefSigner<'a> {
+impl Signer for TestnetRefSigner<'_> {
     type Sign<'s>
         = Self
     where Self: 's;
 
     fn approve(&self, _: &Psbt) -> Result<Self::Sign<'_>, Rejected> { Ok(self.clone()) }
 }
 
-impl<'a> TestnetRefSigner<'a> {
+impl TestnetRefSigner<'_> {
     fn get(&self, origin: Option<&KeyOrigin>) -> Option<Xpriv> {
         let origin = origin?;
         self.keys.iter().find_map(|(xo, xpriv)| {
@@ -100,7 +100,7 @@ impl<'a> TestnetRefSigner<'a> {
     }
 }
 
-impl<'a> Sign for TestnetRefSigner<'a> {
+impl Sign for TestnetRefSigner<'_> {
     fn sign_ecdsa(
         &self,
         message: Sighash,