aya: fix clippy warnings

aya/src/programs/tc.rs

@@ -187,7 +187,7 @@ pub fn qdisc_detach_program(
 
     let prios = unsafe { netlink_find_filter_with_name(if_index, attach_type, &c_name)? };
     if prios.is_empty() {
-        return Err(io::Error::new(io::ErrorKind::NotFound, format!("{}", name)));
+        return Err(io::Error::new(io::ErrorKind::NotFound, name.to_string()));
     }
 
     for prio in prios {

aya/src/sys/netlink.rs

@@ -227,7 +227,7 @@ pub(crate) unsafe fn netlink_find_filter_with_name(
         let attrs = parse_attrs(&msg.data[mem::size_of::<tcmsg>()..])?;
 
         if let Some(opts) = attrs.get(&(TCA_OPTIONS as u16)) {
-            let opts = parse_attrs(&opts.data)?;
+            let opts = parse_attrs(opts.data)?;
             if let Some(f_name) = opts.get(&(TCA_BPF_NAME as u16)) {
                 if let Ok(f_name) = CStr::from_bytes_with_nul(f_name.data) {
                     if name == f_name {
@@ -513,7 +513,7 @@ impl<'a> Iterator for NlAttrsIterator<'a> {
 
     fn next(&mut self) -> Option<Self::Item> {
         let buf = &self.attrs[self.offset..];
-        if buf.len() == 0 {
+        if buf.is_empty() {
             return None;
         }