SEC-2954: Update ActiveDirectoryLdapAuthenticationProvider javadoc

Cleaning up docs to match
cd352f665b (diff-c7d6415af2848047b4b7bde824f66fcb)

ldap/src/main/java/org/springframework/security/ldap/authentication/ad/ActiveDirectoryLdapAuthenticationProvider.java

@@ -49,9 +49,7 @@ import java.util.regex.Pattern;
  * <p>
  * It will authenticate using the Active Directory <a
  * href="http://msdn.microsoft.com/en-us/library/ms680857%28VS.85%29.aspx">
- * {@code userPrincipalName}</a> or <a
- * href="http://msdn.microsoft.com/en-us/library/ms679635%28v=vs.85%29.aspx">
- * {@code sAMAccountName}</a> (or a custom {@link #setSearchFilter(String) searchFilter})
+ * {@code userPrincipalName}</a> or a custom {@link #setSearchFilter(String) searchFilter}
  * in the form {@code username@domain}. If the username does not already end with the
  * domain name, the {@code userPrincipalName} will be built by appending the configured
  * domain name to the username supplied in the authentication request. If no domain name