Remove dead code

schala-repl/src/language.rs

@@ -1,4 +1,3 @@
-use serde::{Serialize, Deserialize};
 use std::time;
 
 pub trait ProgrammingLanguageInterface {

schala-repl/src/repl/mod.rs

@@ -1,6 +1,5 @@
 use std::fmt::Write as FmtWrite;
 use std::io::Write;
-use std::fs::File;
 use std::sync::Arc;
 use std::collections::HashSet;
 

schala-repl/src/repl/repl_options.rs

@@ -1,4 +1,3 @@
-use serde::{Serialize, Deserialize};
 use crate::language::DebugAsk;
 
 use std::io::{Read, Write};