fix cargo clippy lints

src/config/proxy.rs

@@ -29,7 +29,9 @@ use crate::Result;
 /// would be used for `ordinary.onion`, `matrix.myspecial.onion`, but not `hello.myspecial.onion`.
 #[derive(Clone, Debug, Deserialize)]
 #[serde(rename_all = "snake_case")]
+#[derive(Default)]
 pub enum ProxyConfig {
+    #[default]
     None,
     Global {
         #[serde(deserialize_with = "crate::utils::deserialize_from_str")]
@@ -48,11 +50,6 @@ impl ProxyConfig {
         })
     }
 }
-impl Default for ProxyConfig {
-    fn default() -> Self {
-        ProxyConfig::None
-    }
-}
 
 #[derive(Clone, Debug, Deserialize)]
 pub struct PartialProxyConfig {