misc: apply clippy lints

assembler/src/expand.rs

@@ -1,8 +1,8 @@
 use common::prelude::Register;
 
 use crate::{
-    AssembleError, dsa, expect_token, expect_type,
-    model::{Node, Opcode, Token, TokenType},
+    AssembleError, expect_token, expect_type,
+    model::{Node, Opcode, Token},
     node,
 };
 
@@ -13,7 +13,7 @@ pub fn expand_pseudo_ops(
     let mut result = Vec::<Node>::with_capacity(nodes.len());
 
     for node in nodes.iter_mut() {
-        if let Err(_) = try_expand(node.clone(), &mut result, module) {
+        if try_expand(node.clone(), &mut result, module).is_err() {
             result.push(node.clone());
         }
     }
@@ -22,9 +22,9 @@ pub fn expand_pseudo_ops(
 }
 
 fn try_expand(
-    mut node: Node,
+    node: Node,
     result: &mut Vec<Node>,
-    module: u64,
+    _module: u64,
 ) -> Result<(), AssembleError> {
     match node.opcode() {
         Opcode::Push => expand_push(node.clone(), result)?,
@@ -176,7 +176,7 @@ fn expand_dx(current: Node, nodes: &mut Vec<Node>) -> Result<(), AssembleError>
     let mut buffer = vec![];
 
     let mut args = current.args();
-    let label = args.remove(0);
+    let _label = args.remove(0);
 
     for word in process_dx_data(args, size)? {
         buffer.push(node!(None, Opcode::Data, Token::Immediate(word)));