Chinese model card: remove leftover GitHub model-guide links and hero image

README_zh.md

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-  <img src="https://raw.githubusercontent.com/OpenBMB/MiniCPM-OCR/main/assets/minicpm-ocr/release-hero.svg" alt="MiniCPM-OCR：快速、准确地将文档解析为文本、表格和公式，通过闪电箭头连接文档与结构化结果；decision model 辅助标出需要复核的区域（示意图）。" width="100%">
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   <a href="https://github.com/OpenBMB/MiniCPM"><img src="https://raw.githubusercontent.com/OpenBMB/MiniCPM-OCR/main/assets/minicpm-ocr/minicpm-logo.jpg" width="300" alt="面壁小钢炮 MiniCPM"></a>
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-  <a href="https://github.com/OpenBMB/MiniCPM-OCR/blob/main/docs/minicpm_ocr_1dot0_zh.md"><strong>MiniCPM-OCR 1.0 模型指南</strong></a>&ensp;<a href="https://huggingface.co/openbmb/MiniCPM-OCR-1.0" title="Hugging Face"><img src="https://raw.githubusercontent.com/OpenBMB/MiniCPM-OCR/main/assets/minicpm-ocr/huggingface_logo-noborder.svg" width="19" height="18" alt="Hugging Face"></a>&ensp;<a href="https://modelscope.cn/models/OpenBMB/MiniCPM-OCR-1.0" title="ModelScope"><img src="https://raw.githubusercontent.com/OpenBMB/MiniCPM-OCR/main/assets/minicpm-ocr/modelscope_logo_padded.svg" width="25" height="14" alt="ModelScope"></a>
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-  <a href="https://github.com/OpenBMB/MiniCPM-OCR/blob/main/docs/minicpm_ocr_jev_zh.md"><strong>MiniCPM-OCR Jev 模型指南</strong></a>&ensp;<a href="https://huggingface.co/openbmb/MiniCPM-OCR-Jev" title="Hugging Face"><img src="https://raw.githubusercontent.com/OpenBMB/MiniCPM-OCR/main/assets/minicpm-ocr/huggingface_logo-noborder.svg" width="19" height="18" alt="Hugging Face"></a>&ensp;<a href="https://modelscope.cn/models/OpenBMB/MiniCPM-OCR-Jev" title="ModelScope"><img src="https://raw.githubusercontent.com/OpenBMB/MiniCPM-OCR/main/assets/minicpm-ocr/modelscope_logo_padded.svg" width="25" height="14" alt="ModelScope"></a>
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   <b>使用指南</b>
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