Minor changes to be concise with other problems in track

pascals-triangle/src/main/java/PascalsTriangle.java

 public class PascalsTriangle {
-
-    public static int[][] computeTriangle(int rows) {
-        return null;
-    }
-
-    public static boolean isTriangle(int[][] triangle) {
-        return false;
-    }
 }

pascals-triangle/src/test/java/PascalsTriangleTest.java

 
     @Test
     public void testTriangleWithFourRows() {
-        int[][] expected = new int[][]{
+        int[][] expectedOutput = new int[][]{
                 {1},
                 {1, 1},
                 {1, 2, 1},
                 {1, 3, 3, 1},
         };
 
-        assertArrayEquals(expected, PascalsTriangle.computeTriangle(4));
+        assertArrayEquals(expectedOutput, PascalsTriangle.computeTriangle(4));
     }
 
     @Test
     public void testTriangleWithSixRows() {
-        int[][] expected = new int[][]{
+        int[][] expectedOutput = new int[][]{
                 {1},
                 {1, 1},
                 {1, 2, 1},
                 {1, 5, 10, 10, 5, 1}
         };
 
-        assertArrayEquals(expected, PascalsTriangle.computeTriangle(6));
+        assertArrayEquals(expectedOutput, PascalsTriangle.computeTriangle(6));
     }
 
     @Test
     public void testExpectEmptyTriangle() {
-        int[][] expected = new int[][]{
+        int[][] expectedOutput = new int[][]{
 
         };
 
-        assertArrayEquals(expected, PascalsTriangle.computeTriangle(0));
+        assertArrayEquals(expectedOutput, PascalsTriangle.computeTriangle(0));
     }
 
     @Test
         assertEquals(false, PascalsTriangle.isTriangle(input));
     }
 
-
     @Test(expected = IllegalArgumentException.class)
     public void testValidatesNotNegativeRows() {
         PascalsTriangle.computeTriangle(-1);