Reduce usage of as_ref and as_mut.

src/packages/lang_core.rs

@@ -273,12 +273,12 @@ fn collect_fn_metadata(
                     crate::tokenizer::Token::DoubleColon.literal_syntax(),
                     ns
                 );
-                scan_module(list, dict, ns.into(), m.as_ref(), filter)
+                scan_module(list, dict, ns.into(), &**m, filter)
             }
         }
 
         for (ns, m) in ctx.iter_imports_raw() {
-            scan_module(&mut list, &dict, ns.clone(), m.as_ref(), filter)
+            scan_module(&mut list, &dict, ns.clone(), &**m, filter)
         }
     }
 

src/packages/map_basic.rs

@@ -191,7 +191,7 @@ mod map_functions {
         if !map1.is_empty() {
             let mut map2 = map2;
 
-            for (m1, v1) in map1.iter_mut() {
+            for (m1, v1) in map1 {
                 if let Some(v2) = map2.get_mut(m1) {
                     let equals = ctx
                         .call_fn_raw(OP_EQUALS, true, false, &mut [v1, v2])?