build(deps): Remove unstructured.paddlepaddle fork

[christinestraub]

This PR aims to remove "unstructured.paddlepaddle" fork. Previously, we used unstructured.paddlepaddle fork to support unstructured.paddleocr on arm64 architecture. But currently, unstructured.paddleocr with unstructured.paddlepaddle fails to work on arm64 architecture. Also, unstructured.paddleocr with the latest version of the original paddlepaddle works on both amd64 and arm64 architectures.

Testing

os.environ["OCR_AGENT"] = "unstructured.partition.utils.ocr_models.paddle_ocr.OCRAgentPaddle"

elements = partition_pdf(
    filename=<file_path>,
    strategy="hi_res",
    infer_table_structure=True,
)