Revert "Add overlayable.xml to res"

This reverts commit 520d9133a30c0bc602bbaac5e9baafb512d9a696.

Reason for revert: b/130438597#6 outlines why we can't yet check this in.

Change-Id: Id7a00e926b16ca2ffc3396cbfae19c753b4b7ee9
diff --git a/res/values/overlayable.xml b/res/values/overlayable.xml
deleted file mode 100644
index b68d615..0000000
--- a/res/values/overlayable.xml
+++ /dev/null
@@ -1,28 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (C) 2019 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.
--->
-<resources>
-    <overlayable name="SystemIcons">
-        <policy type="product|system|vendor">
-            <item type="drawable" name="ic_corp"/>
-            <item type="drawable" name="ic_info_no_shadow"/>
-            <item type="drawable" name="ic_remove_no_shadow"/>
-            <item type="drawable" name="ic_setting"/>
-            <item type="drawable" name="ic_wallpaper"/>
-            <item type="drawable" name="ic_warning"/>
-            <item type="drawable" name="ic_widget"/>
-        </policy>
-    </overlayable>
-</resources>