firmware-xiaomi-tulip: remove unused files

This aligns firmware package content with bare minimal blobs as in firmware-xiaomi-lavender

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approved this merge request

This needs to be merged together with (after) !6321 (merged)

approved this merge request

added 5 commits

• 78934bd7...dc0c9073 - 4 commits from branch postmarketOS:master
• d2bb0c80 - firmware-xiaomi-tulip: remove unused files

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enabled an automatic merge when all merge checks for d2bb0c80 pass

merged