Refactor Dangerous*: drop unused stuff.

Adapted from https://github.com/develar/kotlin/commit/a9e0a42fb1347fa8e21c86b5a073ef8a7c873da0.

js/js.translator/src/org/jetbrains/k2js/translate/utils/dangerous/DangerousData.java

@@ -38,6 +38,9 @@ import java.util.List;
  *         RootNode is a node which contains such an expression. For example, it may be a statement expression belongs to.
  */
 public class DangerousData {
+    @NotNull
+    private final List<JetExpression> nodesToBeGeneratedBefore = Lists.newArrayList();
+
 
     @NotNull
     public static DangerousData collect(@NotNull JetExpression expression, @NotNull TranslationContext context) {
@@ -48,10 +51,7 @@ public class DangerousData {
     }
 
     private static boolean cantContainDangerousElements(@NotNull JetElement element) {
-        if (element instanceof JetBlockExpression) {
-            return true;
-        }
-        return false;
+        return element instanceof JetBlockExpression;
     }
 
     @NotNull
@@ -86,9 +86,6 @@ public class DangerousData {
         return EMPTY;
     }
 
-    @NotNull
-    private final List<JetExpression> nodesToBeGeneratedBefore = Lists.newArrayList();
-
     @Nullable
     private JetExpression dangerousNode = null;
 

js/js.translator/src/org/jetbrains/k2js/translate/utils/dangerous/DangerousTranslator.java

@@ -34,18 +34,15 @@ import java.util.Map;
  * @author Pavel Talanov
  */
 public final class DangerousTranslator extends AbstractTranslator {
-
+    @NotNull
+    private final DangerousData data;
 
     @NotNull
     public static JsNode translate(@NotNull DangerousData data, @NotNull TranslationContext context) {
         assert data.exists();
-        DangerousTranslator translator = new DangerousTranslator(data, context);
-        return translator.translate();
+        return new DangerousTranslator(data, context).translate();
     }
 
-    @NotNull
-    private final DangerousData data;
-
     private DangerousTranslator(@NotNull DangerousData data, @NotNull TranslationContext context) {
         super(context);
         this.data = data;