diff --git a/src/main/java/org/apache/commons/math4/geometry/partitioning/Characterization.java b/src/main/java/org/apache/commons/math4/geometry/partitioning/Characterization.java
index 90b07f415..93fd171fa 100644
--- a/src/main/java/org/apache/commons/math4/geometry/partitioning/Characterization.java
+++ b/src/main/java/org/apache/commons/math4/geometry/partitioning/Characterization.java
@@ -19,7 +19,6 @@ package org.apache.commons.math4.geometry.partitioning;
 import java.util.ArrayList;
 import java.util.List;
 
-import org.apache.commons.math4.exception.MathInternalError;
 import org.apache.commons.math4.geometry.Space;
 
 /** Cut sub-hyperplanes characterization with respect to inside/outside cells.