Remove further wildcards from Collectors

src/java.base/share/classes/java/util/stream/Collectors.java

@@ -245,24 +245,6 @@ public final class Collectors {
                 CH_ID);
     }
 
-
-    /**
-     * Returns a {@code Collector} that accumulates the input elements into a
-     * new {@code List}. There are no guarantees on the type, mutability,
-     * serializability, or thread-safety of the {@code List} returned; if more
-     * control over the returned {@code List} is required, use {@link #toCollection(Supplier)}.
-     *
-     * @param <T> the type of the input elements
-     * @return a {@code Collector} which collects all the input elements into a
-     * {@code List}, in encounter order
-     */
-    public static <T>
-    Collector<T, ArrayList<Object>, List<T>> toList2() {
-        return new CollectorImpl<>(ArrayList::new, List::add,
-                (left, right) -> { left.addAll(right); return left; },
-                CH_ID);
-    }
-
     /**
      * Returns a {@code Collector} that accumulates the input elements into an
      * <a href="../List.html#unmodifiable">unmodifiable List</a> in encounter
@@ -922,9 +904,8 @@ public final class Collectors {
                 }
             }
         }
-
         return new CollectorImpl<>(
-                OptionalBox::new, OptionalBox::accept,
+                OptionalBox::new, Consumer<T>::accept,
                 (a, b) -> {
                     if (b.present) a.accept(b.value);
                     return a;
@@ -970,7 +951,7 @@ public final class Collectors {
      * @see #reducing(BinaryOperator)
      */
     public static <T, U>
-    Collector<T, ?, U> reducing(U identity,
+    Collector<T, U[], U> reducing(U identity,
                                 Function<? super T, ? extends U> mapper,
                                 BinaryOperator<U> op) {
         return new CollectorImpl<>(