Use defaultconfig instead of default on structs

src/steamgriddb/settings.rs

@@ -4,13 +4,4 @@ use serde::Deserialize;
 pub struct SteamGridDbSettings {
     pub enabled: bool,
     pub auth_key: Option<String>,
-}
-
-impl Default for SteamGridDbSettings {
-    fn default() -> Self {
-        Self {
-            enabled: true,
-            auth_key: None,
-        }
-    }
-}
+}