Remove CollectionsUtil.java

Since 05f2bc1, CollectionsUtil.java is not used anymore
by Gerrit.

Change-Id: I5e250bd9e1a3157c4d3f7eda8711517a3e0a59fa

gerrit-server/src/main/java/com/google/gerrit/common/CollectionsUtil.java

@@ -1,43 +0,0 @@
-// Copyright (C) 2010 The Android Open Source Project
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License
-
-package com.google.gerrit.common;
-
-import java.util.Collection;
-
-/** Utilities for manipulating Collections . */
-public class CollectionsUtil {
-  /**
-   * Checks if any of the elements in the first collection can be found in the
-   * second collection.
-   *
-   * @param findAnyOfThese which elements to look for.
-   * @param inThisCollection where to look for them.
-   * @param <E> type of the elements in question.
-   * @return {@code true} if any of the elements in {@code findAnyOfThese} can
-   *         be found in {@code inThisCollection}, {@code false} otherwise.
-   */
-  public static <E> boolean isAnyIncludedIn(Collection<E> findAnyOfThese,
-      Collection<E> inThisCollection) {
-    for (E findThisItem : findAnyOfThese) {
-      if (inThisCollection.contains(findThisItem)) {
-        return true;
-      }
-    }
-    return false;
-  }
-
-  private CollectionsUtil() {
-  }
-}