Remove redundant NOTICE copied from LICENSE.

Identified using the below shell script:

$ find -H . -name LICENSE -type f -print0 | xargs -0 dirname \
  | while read dir; do \
    if [ -f "${dir}/NOTICE" ] \
        && diff "${dir}/LICENSE" "${dir}/NOTICE" >/dev/null; then \
      echo "${dir}/NOTICE"; \
    fi; \
  done

Now that http://r.android.com/r/1235427 and http://r.android.com/r/1238719 are
merged, LICENSE files copied into NOTICE files are no longer needed.

Bug: 67772237
Bug: 68860345

Test: manually built and diffed before and after system image notices
Change-Id: I3a1dccc338507eb130e1143136b671f10df1d9f3
diff --git a/NOTICE b/NOTICE
deleted file mode 100644
index 67a542c..0000000
--- a/NOTICE
+++ /dev/null
@@ -1,17 +0,0 @@
-/*
- * Copyright (c) 2017, The Linux Foundation. All rights reserved.
- * Not a contribution
- * Copyright (C) 2016 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.
- */