diff --git a/app_main/src/main/java/cn/rrg/rdv/util/Proxmark3Installer.java b/app_main/src/main/java/cn/rrg/rdv/util/Proxmark3Installer.java
index 2f9ca932..0290921c 100644
--- a/app_main/src/main/java/cn/rrg/rdv/util/Proxmark3Installer.java
+++ b/app_main/src/main/java/cn/rrg/rdv/util/Proxmark3Installer.java
@@ -3,8 +3,6 @@ package cn.rrg.rdv.util;
 import android.app.Activity;
 import android.app.AlertDialog;
 import android.app.ProgressDialog;
-import android.system.ErrnoException;
-import android.system.Os;
 
 import com.termux.app.TermuxService;