ran clippy fix

src/parse/execute.rs

@@ -20,7 +20,6 @@ use crate::{
     source::source,
     test::double_bracket_test,
     trap::{TrapTarget, trap},
-    true_builtin,
     varcmds::{export, local, readonly, unset},
     zoltraak::zoltraak,
   },

src/parse/mod.rs

@@ -1281,7 +1281,7 @@ impl ParseStream {
     let mut node_tks = vec![];
     let mut redirs = vec![];
     let mut argv = vec![];
-    let mut flags = NdFlags::empty();
+    let flags = NdFlags::empty();
     let mut assignments = vec![];
 
     while let Some(prefix_tk) = tk_iter.next() {