chore: fix clippy

ethers-solc/src/project_util/mock.rs

@@ -33,7 +33,7 @@ impl MockProjectSkeleton {
 }
 
 /// Represents a virtual project
-#[derive(Serialize)]
+#[derive(Serialize, Default)]
 pub struct MockProjectGenerator {
     /// how to name things
     #[serde(skip)]
@@ -368,12 +368,6 @@ impl From<MockProjectSkeleton> for MockProjectGenerator {
     }
 }
 
-impl Default for MockProjectGenerator {
-    fn default() -> Self {
-        Self { name_strategy: Box::new(SimpleNamingStrategy::default()), inner: Default::default() }
-    }
-}
-
 /// Used to determine the names for elements
 trait NamingStrategy {
     /// Return a new name for the given source file id