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diff --git a/third_party/aom/aom_dsp/noise_util.h b/third_party/aom/aom_dsp/noise_util.h
deleted file mode 100644
index 2284a171a..000000000
--- a/third_party/aom/aom_dsp/noise_util.h
+++ /dev/null
@@ -1,68 +0,0 @@
-/*
- * Copyright (c) 2017, 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_AOM_DSP_NOISE_UTIL_H_
-#define AOM_AOM_DSP_NOISE_UTIL_H_
-
-#ifdef __cplusplus
-extern "C" {
-#endif  // __cplusplus
-
-// aom_noise_tx_t is an abstraction of a transform that is used for denoising.
-// It is meant to be lightweight and does hold the transformed data (as
-// the user should not be manipulating the transformed data directly).
-struct aom_noise_tx_t;
-
-// Allocates and returns a aom_noise_tx_t useful for denoising the given
-// block_size. The resulting aom_noise_tx_t should be free'd with
-// aom_noise_tx_free.
-struct aom_noise_tx_t *aom_noise_tx_malloc(int block_size);
-void aom_noise_tx_free(struct aom_noise_tx_t *aom_noise_tx);
-
-// Transforms the internal data and holds it in the aom_noise_tx's internal
-// buffer. For compatibility with existing SIMD implementations, "data" must
-// be 32-byte aligned.
-void aom_noise_tx_forward(struct aom_noise_tx_t *aom_noise_tx,
-                          const float *data);
-
-// Filters aom_noise_tx's internal data using the provided noise power spectral
-// density. The PSD must be at least block_size * block_size and should be
-// populated with a constant or via estimates taken from
-// aom_noise_tx_add_energy.
-void aom_noise_tx_filter(struct aom_noise_tx_t *aom_noise_tx, const float *psd);
-
-// Performs an inverse transform using the internal transform data.
-// For compatibility with existing SIMD implementations, "data" must be 32-byte
-// aligned.
-void aom_noise_tx_inverse(struct aom_noise_tx_t *aom_noise_tx, float *data);
-
-// Aggregates the power of the buffered transform data into the psd buffer.
-void aom_noise_tx_add_energy(const struct aom_noise_tx_t *aom_noise_tx,
-                             float *psd);
-
-// Returns a default value suitable for denosing a transform of the given
-// block_size. The noise "factor" determines the strength of the noise to
-// be removed. A value of about 2.5 can be used for moderate denoising,
-// where a value of 5.0 can be used for a high level of denoising.
-float aom_noise_psd_get_default_value(int block_size, float factor);
-
-// Computes normalized cross correlation of two vectors a and b of length n.
-double aom_normalized_cross_correlation(const double *a, const double *b,
-                                        int n);
-
-// Validates the correlated noise in the data buffer of size (w, h).
-int aom_noise_data_validate(const double *data, int w, int h);
-
-#ifdef __cplusplus
-}  // extern "C"
-#endif  // __cplusplus
-
-#endif  // AOM_AOM_DSP_NOISE_UTIL_H_