diff --git a/src/main/java/de/neemann/digital/analyse/quinemc/QuineMcCluskey.java b/src/main/java/de/neemann/digital/analyse/quinemc/QuineMcCluskey.java
index 356e0cb4c..1e468fe2c 100644
--- a/src/main/java/de/neemann/digital/analyse/quinemc/QuineMcCluskey.java
+++ b/src/main/java/de/neemann/digital/analyse/quinemc/QuineMcCluskey.java
@@ -163,23 +163,6 @@ public class QuineMcCluskey {
         return new QuineMcCluskey(variables, newRows, np);
     }
 
-    QuineMcCluskey removeDuplicates() {
-        TableRows newRows = new TableRows();
-        for (TableRow r : rows) {
-            TableRow i = newRows.findRow(r);
-            if (i == null) {
-                newRows.add(r);
-            } else {
-                i.addSource(r.getSource());
-            }
-        }
-
-        rows.clear();
-        rows.addAll(newRows);
-
-        return this;
-    }
-
     /**
      * @return true id simplification is complete
      */
diff --git a/src/test/java/de/neemann/digital/analyse/quinemc/QuineMcCluskeyRegressionTest.java b/src/test/java/de/neemann/digital/analyse/quinemc/QuineMcCluskeyRegressionTest.java
index 30669ddc1..92e754a24 100644
--- a/src/test/java/de/neemann/digital/analyse/quinemc/QuineMcCluskeyRegressionTest.java
+++ b/src/test/java/de/neemann/digital/analyse/quinemc/QuineMcCluskeyRegressionTest.java
@@ -51,7 +51,7 @@ public class QuineMcCluskeyRegressionTest extends TestCase {
         System.out.println("--");
         while (!t.isFinished()) {
             System.out.println(FormatToExpression.FORMATTER_JAVA.format(t.getExpression()));
-            t = t.simplifyStep().removeDuplicates();
+            t = t.simplifyStep();
         }
         t.simplifyPrimes(new PrimeSelectorDefault());
         assertEquals("A || C", FormatToExpression.FORMATTER_JAVA.format(t.getExpression()));