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diff --git a/third_party/aom/common/av1_config.h b/third_party/aom/common/av1_config.h
deleted file mode 100644
index a15bedb30..000000000
--- a/third_party/aom/common/av1_config.h
+++ /dev/null
@@ -1,86 +0,0 @@
-/*
- * Copyright (c) 2018, Alliance for Open Media. All rights reserved
- *
- * This source code is subject to the terms of the BSD 2 Clause License and
- * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
- * was not distributed with this source code in the LICENSE file, you can
- * obtain it at www.aomedia.org/license/software. If the Alliance for Open
- * Media Patent License 1.0 was not distributed with this source code in the
- * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
- */
-#ifndef AOM_COMMON_AV1_CONFIG_H_
-#define AOM_COMMON_AV1_CONFIG_H_
-
-#include "aom/aom_integer.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-// Struct representing ISOBMFF/Matroska AV1 config. See:
-// https://aomediacodec.github.io/av1-isobmff/#av1codecconfigurationbox-syntax
-//
-// The AV1 config has the following format:
-//
-// unsigned int (1) marker = 1;
-// unsigned int (7) version = 1;
-// unsigned int (3) seq_profile;
-// unsigned int (5) seq_level_idx_0;
-// unsigned int (1) seq_tier_0;
-// unsigned int (1) high_bitdepth;
-// unsigned int (1) twelve_bit;
-// unsigned int (1) monochrome;
-// unsigned int (1) chroma_subsampling_x;
-// unsigned int (1) chroma_subsampling_y;
-// unsigned int (2) chroma_sample_position;
-// unsigned int (3) reserved = 0;
-//
-// unsigned int (1) initial_presentation_delay_present;
-// if (initial_presentation_delay_present) {
-//   unsigned int (4) initial_presentation_delay_minus_one;
-// } else {
-//   unsigned int (4) reserved = 0;
-// }
-//
-// unsigned int (8)[] configOBUs;
-//
-// Note: get_av1config_from_obu() does not currently store 'configOBUs' data, so
-// the field is omitted.
-typedef struct _Av1Config {
-  uint8_t marker;
-  uint8_t version;
-  uint8_t seq_profile;
-  uint8_t seq_level_idx_0;
-  uint8_t seq_tier_0;
-  uint8_t high_bitdepth;
-  uint8_t twelve_bit;
-  uint8_t monochrome;
-  uint8_t chroma_subsampling_x;
-  uint8_t chroma_subsampling_y;
-  uint8_t chroma_sample_position;
-  uint8_t initial_presentation_delay_present;
-  uint8_t initial_presentation_delay_minus_one;
-} Av1Config;
-
-// Attempts to parse a Sequence Header OBU and set the paramenters of 'config'.
-// Returns 0 upon success, and -1 upon failure. 'buffer' can contain multiple
-// OBUs, but the Sequence Header OBU must be the first OBU within the buffer.
-int get_av1config_from_obu(const uint8_t *buffer, size_t length, int is_annexb,
-                           Av1Config *config);
-
-// Attempts to parse an AV1 config from 'buffer'. Returns 0 upon success.
-// Returns -1 when 'buffer_length' is less than 4, when passed NULL pointers, or
-// when parsing of 'buffer' fails.
-int read_av1config(const uint8_t *buffer, size_t buffer_length,
-                   size_t *bytes_read, Av1Config *config);
-
-// Writes 'config' to 'buffer'. Returns 0 upon successful write to 'buffer'.
-// Returns -1 when passed NULL pointers or when 'capacity' insufficient.
-int write_av1config(const Av1Config *config, size_t capacity,
-                    size_t *bytes_written, uint8_t *buffer);
-
-#ifdef __cplusplus
-} /* extern "C" */
-#endif
-
-#endif  // AOM_COMMON_AV1_CONFIG_H_