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/Contact.java

@@ -24,15 +24,12 @@ import java.io.Serializable;
  * @author Ben Alex
  */
 public class Contact implements Serializable {
-	// ~ Instance fields
-	// ================================================================================================
+
 
 	private Long id;
 	private String email;
 	private String name;
 
-	// ~ Constructors
-	// ===================================================================================================
 
 	public Contact(String name, String email) {
 		this.name = name;
@@ -42,8 +39,6 @@ public class Contact implements Serializable {
 	public Contact() {
 	}
 
-	// ~ Methods
-	// ========================================================================================================
 
 	/**
 	 * @return Returns the email.