remove unnecessary type annotation

crates/proto/src/rr/domain/name.rs

@@ -1043,7 +1043,7 @@ impl<'r> BinDecodable<'r> for Name {
     ///  all names will be stored lowercase internally.
     /// This will consume the portions of the `Vec` which it is reading...
     fn read(decoder: &mut BinDecoder<'r>) -> ProtoResult<Name> {
-        let mut labels: SmallVec<[Label; 4]> = SmallVec::new();
+        let mut labels = SmallVec::new();
         read_inner(decoder, &mut labels, None)?;
         Ok(Name {
             is_fqdn: true,