Fix clippy warnings

sea-orm-codegen/src/entity/writer.rs

@@ -934,7 +934,7 @@ mod tests {
         }
         let content = lines.join("");
         let expected: TokenStream = content.parse().unwrap();
-        let generated = generator(&cake_entity, &entity_serde_variant.1)
+        let generated = generator(cake_entity, &entity_serde_variant.1)
             .into_iter()
             .fold(TokenStream::new(), |mut acc, tok| {
                 acc.extend(tok);

src/entity/column.rs

@@ -669,6 +669,7 @@ mod tests {
     fn column_name_enum_name_1() {
         use sea_query::Iden;
 
+        #[allow(clippy::enum_variant_names)]
         mod hello {
             use crate as sea_orm;
             use crate::entity::prelude::*;

src/tests_cfg/rust_keyword.rs

@@ -67,9 +67,7 @@ pub enum Relation {}
 
 impl RelationTrait for Relation {
     fn def(&self) -> RelationDef {
-        match self {
-            _ => panic!("No RelationDef"),
-        }
+        panic!("No RelationDef")
     }
 }