cleanup

platform/core-api/src/com/intellij/psi/SyntaxTraverser.java

@@ -67,7 +67,7 @@ public abstract class SyntaxTraverser<T> extends FilteredTraverser<T, SyntaxTrav
   @Nullable
   public T getRawDeepestLast() {
     for (T result = getRoot(), last; result != null; result = last) {
-      JBIterable<T> children = JBIterable.from(children(result));
+      JBIterable<T> children = children(result);
       if (children.isEmpty()) return result;
       //noinspection AssignmentToForLoopParameter
       last = children.last();

platform/util/src/com/intellij/util/containers/FilteredTraverser.java

@@ -102,7 +102,7 @@ public abstract class FilteredTraverser<T, Self extends FilteredTraverser<T, Sel
   @Override
   public JBIterable<T> children(@NotNull T node) {
     if (!myMeta.expandFilter.value(node) && !Conditions.oneOf(myMeta.roots).value(node)) {
-      return JBIterable.from(Collections.<T>emptyList());
+      return JBIterable.empty();
     }
     return JBIterable.from(childrenImpl(node)).filter(Conditions.not(myMeta.excludeFilter));
   }