PDFBOX-5660: sonar fix

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1922834 13f79535-47bb-0310-9956-ffa450edef68

Author: THausherr

pdfbox/src/test/java/org/apache/pdfbox/pdmodel/interactive/form/PDAcroFormFlattenTest.java

@@ -145,10 +145,8 @@ void testFlatten(String sourceUrl, String targetFileName) throws IOException, UR
     @Test
     void flattenSingleField() throws IOException
     {
-        final File IN_DIR = new File("src/test/resources/org/apache/pdfbox/pdmodel/interactive/form");
-        final String NAME_OF_PDF = "MultilineFields.pdf";
-
-        PDDocument document = Loader.loadPDF(new File(IN_DIR, NAME_OF_PDF));
+        String filename = "src/test/resources/org/apache/pdfbox/pdmodel/interactive/form/MultilineFields.pdf";
+        PDDocument document = Loader.loadPDF(new File(filename));
         PDAcroForm acroForm = document.getDocumentCatalog().getAcroForm();
         int numFieldsBefore = acroForm.getFields().size();