third_party: remove fatfsgen

components/micropython/manifest.py

third_party/fatfsgen/README.md

third_party/fatfsgen/fatfs_utils/__init__.py

third_party/fatfsgen/fatfs_utils/boot_sector.py

third_party/fatfsgen/fatfs_utils/cluster.py

third_party/fatfsgen/fatfs_utils/entry.py

third_party/fatfsgen/fatfs_utils/exceptions.py

third_party/fatfsgen/fatfs_utils/fat.py

third_party/fatfsgen/fatfs_utils/fatfs_parser.py

third_party/fatfsgen/fatfs_utils/fatfs_state.py

third_party/fatfsgen/fatfs_utils/fs_object.py

third_party/fatfsgen/fatfs_utils/long_filename_utils.py

third_party/fatfsgen/fatfs_utils/utils.py

third_party/fatfsgen/fatfsgen.py

third_party/fatfsgen/project_include.cmake

third_party/fatfsgen/wl_fatfsgen.py