update

deploy/lite/android/sdk/src/main/java/com/baidu/paddlex/visual/Visualize.java

@@ -31,11 +31,8 @@ import org.opencv.core.Scalar;
 import org.opencv.core.Size;
 import org.opencv.imgproc.Imgproc;
 
-import java.nio.ByteBuffer;
-import java.nio.FloatBuffer;
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Date;
 import java.util.List;
 import java.util.ListIterator;
 import java.util.Map;