Remove unnecessary instanceof check

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/fileupload/trunk@1456918 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/main/java/org/apache/commons/fileupload/FileUploadBase.java b/src/main/java/org/apache/commons/fileupload/FileUploadBase.java
index 6114bd2..85c23af 100644
--- a/src/main/java/org/apache/commons/fileupload/FileUploadBase.java
+++ b/src/main/java/org/apache/commons/fileupload/FileUploadBase.java
@@ -351,10 +351,8 @@
                     throw new IOFileUploadException(format("Processing of %s request failed. ",
                                                            MULTIPART_FORM_DATA, e.getMessage()), e);
                 }
-                if (fileItem instanceof FileItemHeadersSupport) {
-                    final FileItemHeaders fih = item.getHeaders();
-                    fileItem.setHeaders(fih);
-                }
+                final FileItemHeaders fih = item.getHeaders();
+                fileItem.setHeaders(fih);
             }
             successful = true;
             return items;