Revert "fix(core): added fix for xml parser (#3100)" (#3353)

This reverts commit c3e6d69.

Author: tylerjroach

aws-android-sdk-core/src/main/java/com/amazonaws/regions/RegionMetadataParser.java

@@ -109,10 +109,9 @@ private static List<Region> internalParse(
         Document document;
         try {
 
-            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
-            factory.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
-            factory.setXIncludeAware(false);
-            factory.setExpandEntityReferences(false);
+            DocumentBuilderFactory factory =
+                    DocumentBuilderFactory.newInstance();
+
             DocumentBuilder documentBuilder = factory.newDocumentBuilder();
             document = documentBuilder.parse(input);
 

aws-android-sdk-core/src/main/java/com/amazonaws/util/XpathUtils.java

@@ -45,25 +45,7 @@ public class XpathUtils {
     /** Shared logger */
     private static Log log = LogFactory.getLog(XpathUtils.class);
 
-    private static DocumentBuilderFactory factory = getDocumentBuilderFactory();
-
-
-    /**
-     * Creates new documentbuilderfactory object
-     * @return DocumentBuilderFactory.
-     */
-    private static DocumentBuilderFactory getDocumentBuilderFactory() {
-        try {
-            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
-            dbf.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
-            dbf.setXIncludeAware(false); // Default false for java 8. Disable XML Inclusions leading to SSRF - https://portswigger.net/web-security/xxe/lab-xinclude-attack
-            dbf.setExpandEntityReferences(false);
-            return dbf;
-        }
-        catch (ParserConfigurationException exception){
-            return null;
-        }
-    }
+    private static DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
 
     /**
      * InputStream to Document.