removed unused variable

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1141884 13f79535-47bb-0310-9956-ffa450edef68

src/main/java/org/apache/commons/math/optimization/general/NonLinearConjugateGradientOptimizer.java

@@ -149,15 +149,10 @@ public class NonLinearConjugateGradientOptimizer
                 }
             }
 
-            double dTd = 0;
-            for (final double di : searchDirection) {
-                dTd += di * di;
-            }
-
             // Find the optimal step in the search direction.
             final UnivariateRealFunction lsf = new LineSearchFunction(searchDirection);
             final double uB = findUpperBound(lsf, 0, initialStep);
-            // XXX Last parameters is set to a value clode to zero in order to
+            // XXX Last parameters is set to a value close to zero in order to
             // work around the divergence problem in the "testCircleFitting"
             // unit test (see MATH-439).
             final double step = solver.solve(maxEval, lsf, 0, uB, 1e-15);