Revert "Add support for "d4" server (experimental)" -- inadvertent merge

This reverts commit 37885f9.

Author: jrobinso

src/main/java/org/broad/igv/bigwig/D4ServerSource.java

@@ -31,7 +31,6 @@
 import org.apache.log4j.Logger;
 import org.broad.igv.bbfile.BBFileReader;
 import org.broad.igv.bigwig.BigWigDataSource;
-import org.broad.igv.bigwig.D4ServerSource;
 import org.broad.igv.blast.BlastMapping;
 import org.broad.igv.blast.BlastParser;
 import org.broad.igv.data.*;
@@ -812,18 +811,6 @@ public void loadTDFFile(ResourceLocator locator, List<Track> newTracks, Genome g
 
     }
 
-    public void loadD4File(ResourceLocator locator, List<Track> newTracks, Genome genome) throws IOException {
-
-        String trackName = locator.getTrackName();
-        String trackId = locator.getPath();
-        DataSource d4Source = new D4ServerSource(locator.getPath(), genome);
-        DataSourceTrack track = new DataSourceTrack(locator, trackId, trackName, d4Source);
-        track.setTrackType(TrackType.OTHER);
-        track.setAutoScale(true);
-        newTracks.add(track);
-
-    }
-
     public void loadBWFile(ResourceLocator locator, List<Track> newTracks, Genome genome) throws IOException {
 
         String trackName = locator.getTrackName();