style: include DLS_DEAD_LOCAL_STORE (#5276)

Author: vil02

spotbugs-exclude.xml

@@ -65,9 +65,6 @@
     <Match>
         <Bug pattern="UWF_UNWRITTEN_FIELD" />
     </Match>
-    <Match>
-        <Bug pattern="DLS_DEAD_LOCAL_STORE" />
-    </Match>
     <Match>
         <Bug pattern="UWF_NULL_FIELD" />
     </Match>

src/main/java/com/thealgorithms/maths/Gaussian.java

@@ -7,7 +7,6 @@ private Gaussian() {
     }
 
     public static ArrayList<Double> gaussian(int matSize, ArrayList<Double> matrix) {
-        ArrayList<Double> answerArray = new ArrayList<Double>();
         int i;
         int j = 0;
 
@@ -22,8 +21,7 @@ public static ArrayList<Double> gaussian(int matSize, ArrayList<Double> matrix)
         }
 
         mat = gaussianElimination(matSize, i, mat);
-        answerArray = valueOfGaussian(matSize, x, mat);
-        return answerArray;
+        return valueOfGaussian(matSize, x, mat);
     }
 
     // Perform Gaussian elimination

src/test/java/com/thealgorithms/maths/GaussianTest.java

@@ -12,7 +12,6 @@ public class GaussianTest {
     @Test
     void passTest1() {
         ArrayList<Double> list = new ArrayList<Double>();
-        ArrayList<Double> gaussian = new ArrayList<Double>();
         ArrayList<Double> answer = new ArrayList<Double>();
         answer.add(0.0);
         answer.add(1.0);
@@ -24,8 +23,7 @@ void passTest1() {
         list.add(2.0);
         list.add(1.0);
         list.add(1.0);
-        gaussian = gaussian(matrixSize, list);
 
-        assertEquals(answer, gaussian);
+        assertEquals(answer, gaussian(matrixSize, list));
     }
 }