chore: fixed warns

Author: Zffu

compiler/compiler_main/src/cli.rs

@@ -1,4 +1,4 @@
-use std::path::{Path, PathBuf};
+use std::path::PathBuf;
 
 use clap::{Parser, Subcommand, ValueEnum};
 

compiler/compiler_main/src/cmds/check.rs

@@ -13,12 +13,12 @@ pub fn run_check(path: String, layer: IRLayer) {
 
     match layer {
         IRLayer::HIR => {
-            let hir = run_astoir_hir(ast.unwrap());
+            let _hir = run_astoir_hir(ast.unwrap());
             quietlyquit_if_errors!();
         }
 
         IRLayer::MIR => {
-            let mir = run_astoir_mir(ast.unwrap());
+            let _mir = run_astoir_mir(ast.unwrap());
             quietlyquit_if_errors!();
         }
     }

compiler/compiler_main/src/main.rs

@@ -1,6 +1,6 @@
 use std::{
     fs,
-    path::{Path, PathBuf},
+    path::PathBuf,
     time::Instant,
 };
 
@@ -43,7 +43,7 @@ fn main() {
             out,
             bridge,
             format,
-            linker,
+            linker: _,
             input,
         } => {
             let needs_dir = input.len() > 1 && format != OutputFormat::Executable;