8303540: Eliminate unnecessary reference to javac internal class

Reviewed-by: hannesw

Author: jonathan-gibbons

src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/toolkit/util/Utils.java

@@ -111,7 +111,6 @@
 import com.sun.source.util.DocSourcePositions;
 import com.sun.source.util.DocTrees;
 import com.sun.source.util.TreePath;
-import com.sun.tools.javac.model.JavacTypes;
 import jdk.javadoc.internal.doclets.toolkit.BaseConfiguration;
 import jdk.javadoc.internal.doclets.toolkit.BaseOptions;
 import jdk.javadoc.internal.doclets.toolkit.CommentUtils;
@@ -1294,9 +1293,8 @@ public Object getPreviewFeature(Element e) {
      */
     private Object getAnnotationElement(Element e, TypeMirror annotationType, String annotationElementName) {
         List<? extends AnnotationMirror> annotationList = e.getAnnotationMirrors();
-        JavacTypes jctypes = ((DocEnvImpl) configuration.docEnv).toolEnv.typeutils;
         for (AnnotationMirror anno : annotationList) {
-            if (jctypes.isSameType(anno.getAnnotationType(), annotationType)) {
+            if (typeUtils.isSameType(anno.getAnnotationType(), annotationType)) {
                 Map<? extends ExecutableElement, ? extends AnnotationValue> pairs = anno.getElementValues();
                 if (!pairs.isEmpty()) {
                     for (ExecutableElement element : pairs.keySet()) {