REFAC : Remove python doc in diapotb

doc_cookbook/src/ProcessingChains.md

doc_cookbook/src/ProcessingChains/Sar_MultiSlc_Chain.md

doc_cookbook/src/ProcessingChains/Sar_MultiSlc_IW_Chain.md

doc_cookbook/src/ProcessingChains/diapOTB_Chain.md

doc_cookbook/src/ProcessingChains/diapOTB_S1IW_Chain.md

doc_cookbook/src/ProcessingChains/tuto_chains.md

doc_cookbook/src/PythonAPI/pythonAPI.md

doc_cookbook/src/PythonAPI/pythonDesign.md