_destroyImageryTexCoordAttributes() {
    const attributes = this._imageryTexCoordAttributesPerProjection;
    if (!defined(attributes)) {
      return;
    }
    const n = attributes.length;
    for (let i = 0; i < n; i++) {
      const attribute = attributes[i];
      if (defined(attribute)) {
        if (defined(attribute.buffer)) {
          if (!attribute.buffer.isDestroyed()) {
            attribute.buffer.destroy();
          }
        }
        attributes[i] = undefined;
      }
    }
    delete this._imageryTexCoordAttributesPerProjection;
  }
Destroy the <code>_imageryTexCoordAttributesPerProjection</code>
array.

This is called for cleaning up the allocated GPU resources, before
they are supposed to be re-computed with
<code>_computeImageryTexCoordsAttributesPerProjection</code>