Revert of media: add video capture device for ARC++ camera HAL v3

media/capture/video/chromeos/mojo/arc_camera3_metadata.mojom

-// Copyright 2017 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-module arc.mojom;
-
-import "camera_metadata_tags.mojom";
-
-enum EntryType {
-  TYPE_BYTE = 0,
-  TYPE_INT32 = 1,
-  TYPE_FLOAT = 2,
-  TYPE_INT64 = 3,
-  TYPE_DOUBLE = 4,
-  TYPE_RATIONAL = 5,
-  NUM_TYPES
-};
-
-// CameraMetadataEntry is a translation of the camera_metadata_entry_t in
-// Android camera HAL v3 API (https://goo.gl/OC8sOH).  A CameraMetadataEntry
-// holds the values of one type of metadata specified by |tag|.
-struct CameraMetadataEntry {
-  uint32 index;
-  CameraMetadataTag tag;
-  EntryType type;
-  uint32 count;  // The number of data entries as |type| in |data|.
-  array<uint8> data;
-};
-
-// CameraMetadata is a translation of the camera_metadata struct in Android
-// camera HAL v3 API (https://goo.gl/G7ligz).  A CameraMetadata holds a
-// collection of metadata tags and their values.
-struct CameraMetadata {
-  uint32 size;
-  uint32 entry_count;
-  uint32 entry_capacity;
-  uint32 data_count;
-  uint32 data_capacity;
-  array<CameraMetadataEntry>? entries;
-};