Remove superfluous comments

Use '^\s+//\ \~\ .*$' and '^\s+//\ ============+$' regular expression
searches to remove superfluous comments.

Prior to this commit, many classes would have comments to indicate
blocks of code (such as constructors/methods/instance fields). These
added a lot of noise and weren't all that helpful, especially given
the outline views available in most modern IDEs.

Issue gh-8945

samples/xml/contacts/src/main/java/sample/contact/ContactDao.java

@@ -24,8 +24,7 @@ import java.util.List;
  * @author Ben Alex
  */
 public interface ContactDao {
-	// ~ Methods
-	// ========================================================================================================
+
 
 	void create(Contact contact);