Fix clippy warnings (#275)

src/driver/crypto.rs

@@ -581,7 +581,7 @@ mod test {
 
         // If there is no mutual intelligibility, return an error.
         let bad_modes = ["not_real", "des", "rc5"];
-        assert!(CryptoMode::negotiate(&bad_modes, None).is_err());
-        assert!(CryptoMode::negotiate(&bad_modes, Some(CryptoMode::Aes256Gcm)).is_err());
+        assert!(CryptoMode::negotiate(bad_modes, None).is_err());
+        assert!(CryptoMode::negotiate(bad_modes, Some(CryptoMode::Aes256Gcm)).is_err());
     }
 }

src/driver/tasks/mixer/mix_logic.rs

@@ -246,7 +246,7 @@ pub fn mix_symph_indiv(
                     resample_in_progress = true;
                     continue;
                 }
-            };
+            }
 
             let samples_marched = mix_resampled(rs_out_buf, symph_mix, samples_written, volume);
 

src/driver/tasks/mixer/mod.rs

@@ -679,12 +679,11 @@ impl Mixer {
 
             Ok(())
         } else {
-            self._send_packet(packet)
+            self.send_packet_(packet)
         };
 
         #[cfg(not(test))]
-        #[allow(clippy::used_underscore_items)]
-        let send_status = self._send_packet(packet);
+        let send_status = self.send_packet_(packet);
 
         send_status.or_else(Error::disarm_would_block)?;
 
@@ -692,7 +691,7 @@ impl Mixer {
     }
 
     #[inline]
-    fn _send_packet(&self, packet: &[u8]) -> Result<()> {
+    fn send_packet_(&self, packet: &[u8]) -> Result<()> {
         let conn = self
             .conn_active
             .as_ref()