Revert "iter"

This reverts commit 17432fe.

Author: martijnvg

server/src/main/java/org/elasticsearch/index/mapper/IpFieldMapper.java

@@ -568,7 +568,6 @@ protected String contentType() {
     protected void parseCreateField(DocumentParserContext context) throws IOException {
         InetAddress address;
         String value = context.parser().textOrNull();
-        boolean isNotNull = value != null || nullValue != null;
         try {
             address = value == null ? nullValue : InetAddresses.forString(value);
         } catch (IllegalArgumentException e) {
@@ -583,11 +582,11 @@ protected void parseCreateField(DocumentParserContext context) throws IOExceptio
                 throw e;
             }
         }
-        if (isNotNull) {
+        if (address != null) {
             indexValue(context, address);
         }
         if (offsetsFieldName != null && context.isImmediateParentAnArray() && context.canAddIgnoredField()) {
-            if (isNotNull) {
+            if (address != null) {
                 BytesRef sortableValue = new BytesRef(InetAddressPoint.encode(address));
                 context.getOffSetContext().recordOffset(offsetsFieldName, sortableValue);
             } else {