refactor: follow clippy recommendation :

- Remove unused constructor for Table & Column
- Add .expect in databases. disconnect
- Remove usedless String::from in column serializer

src/lib.rs

@@ -26,7 +26,7 @@ impl DbBuilderFacade {
 
         if let Ok(connection) = connection_result {
             run_command(&connection, sql_tables).expect("Failed to execute query");
-            disconnect(connection).expect("Failed to disconnect from sqlite");
+            disconnect(connection);
             Ok(())
         } else {
             Err("Failed to connect to the server".to_string())