unused imports clean-up

samples/android/tutorial-4-opencl/src/org/opencv/samples/tutorial4/Camera2Renderer.java

@@ -4,12 +4,8 @@ import java.util.Arrays;
 import java.util.concurrent.Semaphore;
 import java.util.concurrent.TimeUnit;
 
-import javax.microedition.khronos.egl.EGLConfig;
-import javax.microedition.khronos.opengles.GL10;
-
 import android.annotation.SuppressLint;
 import android.content.Context;
-import android.graphics.Point;
 import android.graphics.SurfaceTexture;
 import android.hardware.camera2.CameraAccessException;
 import android.hardware.camera2.CameraCaptureSession;

samples/android/tutorial-4-opencl/src/org/opencv/samples/tutorial4/MyGLRendererBase.java

@@ -9,7 +9,6 @@ import android.opengl.GLSurfaceView;
 import android.os.Handler;
 import android.os.Looper;
 import android.util.Log;
-import android.view.View;
 import android.widget.TextView;
 
 public abstract class MyGLRendererBase implements GLSurfaceView.Renderer, SurfaceTexture.OnFrameAvailableListener {