remove unused variables

src/main/java/bdv/export/WriteSequenceToHdf5.java

@@ -627,8 +627,6 @@ public class WriteSequenceToHdf5
 		{
 			progressWriter.out().println( "writing level " + level );
 
-			final long t0 = System.currentTimeMillis();
-
 			final RandomAccessibleInterval< UnsignedShortType > sourceImg;
 			final int[] factor;
 			final boolean useLoopBack;

src/main/java/bdv/img/hdf5/Hdf5ImageLoader.java

@@ -199,7 +199,6 @@ public class Hdf5ImageLoader implements ViewerImgLoader, MultiResolutionImgLoade
 
 				cachedDimsAndExistence.clear();
 
-				final List< TimePoint > timepoints = sequenceDescription.getTimePoints().getTimePointsOrdered();
 				try
 				{
 					hdf5Access = new HDF5AccessHack( hdf5Reader );

src/main/java/bdv/tools/bookmarks/BookmarksEditor.java

@@ -74,15 +74,12 @@ public class BookmarksEditor
 
 	private final InputMap inputMap;
 
-	private final Bookmarks bookmarks;
-
 	private BookmarkTextOverlayAnimator animator;
 
 	public BookmarksEditor( final ViewerPanel viewer, final InputActionBindings inputActionBindings, final Bookmarks bookmarks )
 	{
 		this.viewer = viewer;
 		bindings = inputActionBindings;
-		this.bookmarks = bookmarks;
 		inputMapsToBlock = new ArrayList<>( Arrays.asList( "bdv", "navigation" ) );
 
 		final KeyStroke abortKey = KeyStroke.getKeyStroke( KeyEvent.VK_ESCAPE, 0 );