diff --git a/car_net/stFlashClient/src/main/java/Main.kt b/car_net/stFlashClient/src/main/java/Main.kt
index 7e07bbb179c..0181d413d4a 100644
--- a/car_net/stFlashClient/src/main/java/Main.kt
+++ b/car_net/stFlashClient/src/main/java/Main.kt
@@ -1,14 +1,11 @@
 import com.google.protobuf.ByteString
 import com.martiansoftware.jsap.FlaggedOption
 import com.martiansoftware.jsap.JSAP
-import com.martiansoftware.jsap.JSAPResult
 import io.netty.buffer.Unpooled
 import io.netty.handler.codec.http.*
-import io.netty.util.CharsetUtil
 import proto.Carkot
 import java.io.FileInputStream
 import java.io.IOException
-import java.util.*
 
 /**
  * Created by user on 7/11/16.