removed code already present in test cases related to DFT in Trees fo…

…lder (TheAlgorithms#1648)

Trees/DepthFirstSearch.js

@@ -44,30 +44,4 @@ function searchDFS(tree, value) {
   return null
 }
 
-const tree = [
-  { value: 6, left: 1, right: 2 },
-  { value: 5, left: 3, right: 4 },
-  { value: 7, left: null, right: 5 },
-  { value: 3, left: 6, right: null },
-  { value: 4, left: null, right: null },
-  { value: 9, left: 7, right: 8 },
-  { value: 2, left: 9, right: null },
-  { value: 8, left: null, right: null },
-  { value: 10, left: null, right: null },
-  { value: 1, left: null, right: null }
-]
-searchDFS(tree, 9) // { value: 9, left: 7, right: 8 }
-searchDFS(tree, 200) // null
-traverseDFS(tree, 6) // [ 1, 2, 3, 4, 5, 8, 10, 9, 7, 6 ]
-traverseDFS(tree, 200) // []
-
-//            6
-//           / \
-//          5   7
-//         / \   \
-//        3   4   9
-//       /       / \
-//      2       8   10
-//     /
-//    1
 export { searchDFS, traverseDFS }