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diff --git a/extern/draco/dracoenc/src/draco/compression/attributes/sequential_attribute_encoder.h b/extern/draco/dracoenc/src/draco/compression/attributes/sequential_attribute_encoder.h
deleted file mode 100644
index 540ba947077..00000000000
--- a/extern/draco/dracoenc/src/draco/compression/attributes/sequential_attribute_encoder.h
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@@ -1,133 +0,0 @@
-// Copyright 2016 The Draco Authors.
-//
-// 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.
-//
-#ifndef DRACO_COMPRESSION_ATTRIBUTES_SEQUENTIAL_ATTRIBUTE_ENCODER_H_
-#define DRACO_COMPRESSION_ATTRIBUTES_SEQUENTIAL_ATTRIBUTE_ENCODER_H_
-
-#include "draco/compression/attributes/prediction_schemes/prediction_scheme_interface.h"
-#include "draco/compression/point_cloud/point_cloud_encoder.h"
-
-namespace draco {
-
-// A base class for encoding attribute values of a single attribute using a
-// given sequence of point ids. The default implementation encodes all attribute
-// values directly to the buffer but derived classes can perform any custom
-// encoding (such as quantization) by overriding the EncodeValues() method.
-class SequentialAttributeEncoder {
- public:
-  SequentialAttributeEncoder();
-  virtual ~SequentialAttributeEncoder() = default;
-
-  // Method that can be used for custom initialization of an attribute encoder,
-  // such as creation of prediction schemes and initialization of attribute
-  // encoder dependencies.
-  // |encoder| is the parent PointCloudEncoder,
-  // |attribute_id| is the id of the attribute that is being encoded by this
-  // encoder.
-  // This method is automatically called by the PointCloudEncoder after all
-  // attribute encoders are created and it should not be called explicitly from
-  // other places.
-  virtual bool Init(PointCloudEncoder *encoder, int attribute_id);
-
-  // Initialization for a specific attribute. This can be used mostly for
-  // standalone encoding of an attribute without an PointCloudEncoder.
-  virtual bool InitializeStandalone(PointAttribute *attribute);
-
-  // Transforms attribute data into format that is going to be encoded
-  // losslessly. The transform itself can be lossy.
-  virtual bool TransformAttributeToPortableFormat(
-      const std::vector<PointIndex> &point_ids);
-
-  // Performs lossless encoding of the transformed attribute data.
-  virtual bool EncodePortableAttribute(const std::vector<PointIndex> &point_ids,
-                                       EncoderBuffer *out_buffer);
-
-  // Encodes any data related to the portable attribute transform.
-  virtual bool EncodeDataNeededByPortableTransform(EncoderBuffer *out_buffer);
-
-  virtual bool IsLossyEncoder() const { return false; }
-
-  int NumParentAttributes() const {
-    return static_cast<int>(parent_attributes_.size());
-  }
-  int GetParentAttributeId(int i) const { return parent_attributes_[i]; }
-
-  const PointAttribute *GetPortableAttribute() const {
-    if (portable_attribute_ != nullptr)
-      return portable_attribute_.get();
-    return attribute();
-  }
-
-  // Called when this attribute encoder becomes a parent encoder of another
-  // encoder.
-  void MarkParentAttribute();
-
-  virtual uint8_t GetUniqueId() const {
-    return SEQUENTIAL_ATTRIBUTE_ENCODER_GENERIC;
-  }
-
-  const PointAttribute *attribute() const { return attribute_; }
-  int attribute_id() const { return attribute_id_; }
-  PointCloudEncoder *encoder() const { return encoder_; }
-
- protected:
-  // Should be used to initialize newly created prediction scheme.
-  // Returns false when the initialization failed (in which case the scheme
-  // cannot be used).
-  virtual bool InitPredictionScheme(PredictionSchemeInterface *ps);
-
-  // Sets parent attributes for a given prediction scheme. Must be called
-  // after all prediction schemes are initialized, but before the prediction
-  // scheme is used.
-  virtual bool SetPredictionSchemeParentAttributes(
-      PredictionSchemeInterface *ps);
-
-  // Encodes all attribute values in the specified order. Should be overridden
-  // for specialized  encoders.
-  virtual bool EncodeValues(const std::vector<PointIndex> &point_ids,
-                            EncoderBuffer *out_buffer);
-
-  bool is_parent_encoder() const { return is_parent_encoder_; }
-
-  void SetPortableAttribute(std::unique_ptr<PointAttribute> att) {
-    portable_attribute_ = std::move(att);
-  }
-
-  // Returns a mutable attribute that should be filled by derived encoders with
-  // the transformed version of the attribute data. To get a public const
-  // version, use the GetPortableAttribute() method.
-  PointAttribute *portable_attribute() { return portable_attribute_.get(); }
-
- private:
-  PointCloudEncoder *encoder_;
-  const PointAttribute *attribute_;
-  int attribute_id_;
-
-  // List of attribute encoders that need to be encoded before this attribute.
-  // E.g. The parent attributes may be used to predict values used by this
-  // attribute encoder.
-  std::vector<int32_t> parent_attributes_;
-
-  bool is_parent_encoder_;
-
-  // Attribute that stores transformed data from the source attribute after it
-  // is processed through the ApplyTransform() method. Attribute data stored
-  // within this attribute is guaranteed to be encoded losslessly and it can be
-  // safely used for prediction of other attributes.
-  std::unique_ptr<PointAttribute> portable_attribute_;
-};
-
-}  // namespace draco
-
-#endif  // DRACO_COMPRESSION_ATTRIBUTES_SEQUENTIAL_ATTRIBUTE_ENCODER_H_