More work on Rune

src/script_implementations/rune/script.rs

@@ -6,9 +6,8 @@ use crate::StringKey;
 use hashbrown::HashMap;
 use parking_lot::RwLock;
 use rune::runtime::{Object, RuntimeContext, Shared, VmError, VmResult};
-use rune::{Any, Unit, Value};
+use rune::{Unit, Value};
 use std::convert::TryFrom;
-use std::error::Error;
 use std::ops::Deref;
 use std::sync::atomic::{AtomicBool, AtomicUsize};
 use std::sync::Arc;
@@ -73,7 +72,7 @@ impl Script for RuneScript {
         if pars.is_empty() {
             return Ok(());
         }
-        let mut write_lock = self.state.write();
+        let write_lock = self.state.write();
         for par in pars {
             let key = rune::alloc::string::String::try_from(par.0.str())?;
             write_lock