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Update DepthFirstSearch.java - signature removed, and whitespaces resolved

Co-Authored-By: Libin Yang <contact@yanglibin.info>

src/main/java/com/search/DepthFirstSearch.java

@@ -12,7 +12,6 @@ package src.main.java.com.search;
  * Best-case performance	O(1)
  * Average performance	   	O(n)
  * 
- * @author abir (https://github.com/abircb)
  */
 
 public class DepthFirstSearch {
@@ -35,14 +34,12 @@ public class DepthFirstSearch {
  * The BinaryTree class defines the structure of a binary tree
  * Also contains a static nested class called TreeNode
  * @param <T>
- * @author abir
  */
 class BinaryTree<T extends Comparable<T>> {
 	
 	private TreeNode<T> root;
 	
 	/**
-	 * @author abir
 	 * @param <P> 
 	 * This class defines what a node in a binary tree looks like
 	 */