Fix clippy::needless_borrow in console

Clippy says the compiler automatically borrows this

src/console/mod.rs

@@ -135,7 +135,7 @@ impl Var for CVar<String> {
     }
 
     fn deserialize(&self, input: &str) -> Box<dyn Any> {
-        Box::new((&input[1..input.len() - 1]).to_owned())
+        Box::new(input[1..input.len() - 1].to_owned())
     }
 
     fn description(&self) -> &'static str {