diff --git a/render-app/src/main/java/org/janelia/alignment/mapper/SingleChannelMapper.java b/render-app/src/main/java/org/janelia/alignment/mapper/SingleChannelMapper.java
index b9c14bb6d..a4796ec0a 100644
--- a/render-app/src/main/java/org/janelia/alignment/mapper/SingleChannelMapper.java
+++ b/render-app/src/main/java/org/janelia/alignment/mapper/SingleChannelMapper.java
@@ -33,10 +33,6 @@ public class SingleChannelMapper
 	final AffineTransform2D tInv;
 	final double[] tmp;
 
-    // 2x2 subsampling using top-left pixels
-//    final int subsampling = 2;
-//    final long[] offset = new long[] { 0, 0 };
-
     // 2x2 subsampling using bottom-right pixels
 //    final int subsampling = 2;
 //    final long[] offset = new long[] { -1, -1 };