diff --git a/src/main/java/org/apache/commons/math/distribution/NormalDistributionImpl.java b/src/main/java/org/apache/commons/math/distribution/NormalDistributionImpl.java
index bebd36343..4bc45706b 100644
--- a/src/main/java/org/apache/commons/math/distribution/NormalDistributionImpl.java
+++ b/src/main/java/org/apache/commons/math/distribution/NormalDistributionImpl.java
@@ -21,7 +21,6 @@ import java.io.Serializable;
 
 import org.apache.commons.math.MathException;
 import org.apache.commons.math.MathRuntimeException;
-import org.apache.commons.math.MaxIterationsExceededException;
 import org.apache.commons.math.exception.util.LocalizedFormats;
 import org.apache.commons.math.special.Erf;
 import org.apache.commons.math.util.FastMath;
diff --git a/src/main/java/org/apache/commons/math/optimization/fitting/HarmonicFitter.java b/src/main/java/org/apache/commons/math/optimization/fitting/HarmonicFitter.java
index c21138dea..a7f0831a1 100644
--- a/src/main/java/org/apache/commons/math/optimization/fitting/HarmonicFitter.java
+++ b/src/main/java/org/apache/commons/math/optimization/fitting/HarmonicFitter.java
@@ -17,7 +17,6 @@
 
 package org.apache.commons.math.optimization.fitting;
 
-import org.apache.commons.math.MathRuntimeException;
 import org.apache.commons.math.exception.util.LocalizedFormats;
 import org.apache.commons.math.optimization.DifferentiableMultivariateVectorialOptimizer;
 import org.apache.commons.math.optimization.OptimizationException;
diff --git a/src/main/java/org/apache/commons/math/optimization/fitting/PolynomialFitter.java b/src/main/java/org/apache/commons/math/optimization/fitting/PolynomialFitter.java
index 68973845d..310f11545 100644
--- a/src/main/java/org/apache/commons/math/optimization/fitting/PolynomialFitter.java
+++ b/src/main/java/org/apache/commons/math/optimization/fitting/PolynomialFitter.java
@@ -17,7 +17,6 @@
 
 package org.apache.commons.math.optimization.fitting;
 
-import org.apache.commons.math.MathRuntimeException;
 import org.apache.commons.math.analysis.polynomials.PolynomialFunction;
 import org.apache.commons.math.optimization.DifferentiableMultivariateVectorialOptimizer;
 import org.apache.commons.math.optimization.OptimizationException;
diff --git a/src/test/java/org/apache/commons/math/analysis/polynomials/PolynomialSplineFunctionTest.java b/src/test/java/org/apache/commons/math/analysis/polynomials/PolynomialSplineFunctionTest.java
index c649e19f8..a529cf77b 100644
--- a/src/test/java/org/apache/commons/math/analysis/polynomials/PolynomialSplineFunctionTest.java
+++ b/src/test/java/org/apache/commons/math/analysis/polynomials/PolynomialSplineFunctionTest.java
@@ -21,7 +21,6 @@ import junit.framework.TestCase;
 
 import org.apache.commons.math.ArgumentOutsideDomainException;
 import org.apache.commons.math.analysis.UnivariateRealFunction;
-import org.apache.commons.math.exception.MathUserException;
 
 /**
  * Tests the PolynomialSplineFunction implementation.