Unused "import".
diff --git a/commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/optim/nonlinear/scalar/noderiv/SimplexOptimizerMultiDirectionalTest.java b/commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/optim/nonlinear/scalar/noderiv/SimplexOptimizerMultiDirectionalTest.java
index 3f88462..3b30b95 100644
--- a/commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/optim/nonlinear/scalar/noderiv/SimplexOptimizerMultiDirectionalTest.java
+++ b/commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/optim/nonlinear/scalar/noderiv/SimplexOptimizerMultiDirectionalTest.java
@@ -26,7 +26,6 @@
 import org.apache.commons.math4.legacy.optim.SimpleBounds;
 import org.apache.commons.math4.legacy.optim.nonlinear.scalar.GoalType;
 import org.apache.commons.math4.legacy.optim.nonlinear.scalar.ObjectiveFunction;
-import org.apache.commons.math4.legacy.optim.nonlinear.scalar.TestFunction;
 import org.apache.commons.math4.legacy.core.MathArrays;
 import org.apache.commons.math4.legacy.core.jdkmath.AccurateMath;
 import org.junit.Assert;