Use more impl header lifetime elision

There are two big categories of changes in here

- Removing lifetimes from common traits that can essentially never user a lifetime from an input (particularly `Drop` & `Debug`)
- Forwarding impls that are only possible because the lifetime doesn't matter (like `impl<R: Read + ?Sized> Read for &mut R`)

I omitted things that seemed like they could be more controversial, like the handful of iterators that have a `Item: 'static` despite the iterator having a lifetime or the `PartialEq` implementations where the flipped one cannot elide the lifetime.

2 files changed, 4 insertions, 4 deletions

diff --git a/src/libstd/net/addr.rs b/src/libstd/net/addr.rs
index 8ace1127658..f9f89468a49 100644
--- a/src/libstd/net/addr.rs
+++ b/src/libstd/net/addr.rs
@@ -861,7 +861,7 @@ fn resolve_socket_addr(lh: LookupHost) -> io::Result<vec::IntoIter<SocketAddr>>
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
-impl<'a> ToSocketAddrs for (&'a str, u16) {
+impl ToSocketAddrs for (&str, u16) {
     type Iter = vec::IntoIter<SocketAddr>;
     fn to_socket_addrs(&self) -> io::Result<vec::IntoIter<SocketAddr>> {
         let (host, port) = *self;
@@ -904,7 +904,7 @@ impl<'a> ToSocketAddrs for &'a [SocketAddr] {
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
-impl<'a, T: ToSocketAddrs + ?Sized> ToSocketAddrs for &'a T {
+impl<T: ToSocketAddrs + ?Sized> ToSocketAddrs for &T {
     type Iter = T::Iter;
     fn to_socket_addrs(&self) -> io::Result<T::Iter> {
         (**self).to_socket_addrs()
diff --git a/src/libstd/net/tcp.rs b/src/libstd/net/tcp.rs
index 86ecb10edf2..f0e6936e9da 100644
--- a/src/libstd/net/tcp.rs
+++ b/src/libstd/net/tcp.rs
@@ -580,7 +580,7 @@ impl Write for TcpStream {
     fn flush(&mut self) -> io::Result<()> { Ok(()) }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
-impl<'a> Read for &'a TcpStream {
+impl Read for &TcpStream {
     fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> { self.0.read(buf) }
 
     #[inline]
@@ -589,7 +589,7 @@ impl<'a> Read for &'a TcpStream {
     }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
-impl<'a> Write for &'a TcpStream {
+impl Write for &TcpStream {
     fn write(&mut self, buf: &[u8]) -> io::Result<usize> { self.0.write(buf) }
     fn flush(&mut self) -> io::Result<()> { Ok(()) }
 }