Rely on bitmap RevFilter to filter tip commit setup walk

This RevWalk filters out reused bitmap commits via the 'reuse' bitmap.
Avoid possible wasted time and complexity by not redundantly marking
them UNINTERESTING any more.

Change-Id: If467ccd1d75e17cf9367b2a0399fca3f9d52adf9

org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/pack/PackWriterBitmapPreparer.java

@@ -389,7 +389,6 @@ class PackWriterBitmapPreparer {
 
 			RevCommit rc = (RevCommit) ro;
 			reuseCommits.add(new BitmapCommit(rc, false, entry.getFlags()));
-			rw.markUninteresting(rc);
 			if (!reuse.contains(rc)) {
 				EWAHCompressedBitmap bitmap = bitmapRemapper.ofObjectType(
 						bitmapRemapper.getBitmap(rc), Constants.OBJ_COMMIT);