diff --git a/app/src/main/java/com/nbee/echolink/MainActivity.java b/app/src/main/java/com/nbee/echolink/MainActivity.java
index 5c057e1..4b7e577 100644
--- a/app/src/main/java/com/nbee/echolink/MainActivity.java
+++ b/app/src/main/java/com/nbee/echolink/MainActivity.java
@@ -26,8 +26,6 @@ public class MainActivity extends AppCompatActivity {
     private final String TAG =  "MainActivity";
     private PermissionUtils permissionUtils;
     private TextView logTextView; // 将类型从 View 更改为 TextView
-    private ShellUtils shellUtils;
-    private boolean isRoot;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {