Fixed warnings introduced by Scala 2.13 upgrade

Author: mpilquist

core/shared/src/main/scala/fs2/Chunk.scala

@@ -1459,6 +1459,7 @@ object Chunk
 
   /** `Traverse`, `Monad`, `Alternative`, and `TraverseFilter` instance for `Chunk`.
     */
+  @nowarn213("msg=parameterless")
   implicit val instance
       : Traverse[Chunk] with Monad[Chunk] with Alternative[Chunk] with TraverseFilter[Chunk] =
     new Traverse[Chunk] with Monad[Chunk] with Alternative[Chunk] with TraverseFilter[Chunk] {

io/native/src/main/scala/fs2/io/net/FdPollingIpSocketsProvider.scala

@@ -128,7 +128,7 @@ private final class FdPollingIpSocketsProvider[F[_]: Dns: LiftIO](implicit F: As
                 .to
             }
           }(addrFd => F.delay(guard_(close(addrFd._2))))
-          (address, fd) = addrFd
+          (_, fd) = addrFd
           _ <- Resource.eval {
             val setNonBlock = if (!LinktimeInfo.isLinux) setNonBlocking(fd) else F.unit
             setNonBlock *> options.traverse(so => SocketHelpers.setOption(fd, so.key, so.value))