Squash some warnings

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

src/compile/ir.rs

@@ -1,7 +1,7 @@
 use crate::{
     compile::Ctx,
     obj::Sym,
-    syn::{ast, span::*},
+    syn::span::*,
 };
 
 pub type Body = Vec<Stmt>;

src/compile/mod.rs

@@ -4,10 +4,7 @@ pub mod ir;
 pub mod name;
 pub mod visit;
 
-use crate::{
-    syn::ast::Stmt,
-    compile::name::NameStack,
-};
+use crate::compile::name::NameStack;
 
 // * Desugar
 // * Collect names as symbols

src/compile/name.rs

@@ -142,7 +142,7 @@ impl Visit for CollectNames<'_, '_> {
                 self.visit_expr(&i.expr);
                 self.visit_expr(&i.index);
             }
-            Expr::Fun(f) => { /* no-op */ }
+            Expr::Fun(_) => { /* no-op */ }
             Expr::Base(b) => self.visit_base_expr(b),
         }
     }