Remove dtb command from magiskboot #4508

Job	Run time
Build Magisk artifacts	12m 2s
Test building on windows-latest	10m 10s
Test building on ubuntu-latest	3m 46s
Test aosp_cf_x86_64_phone	6m 55s
Test API 23 (x86)	2m 35s
Test aosp_cf_x86_64_phone_pgagnostic	6m 50s
Test API 23 (x86_64)	3m 40s
Test API 24 (x86)	2m 2s
Test API 24 (x86_64)	2m 54s
Test API 25 (x86)	2m 9s
Test API 25 (x86_64)	2m 42s
Test API 26 (x86)	3m 30s
Test API 26 (x86_64)	3m 22s
Test API 27 (x86)	3m 39s
Test API 27 (x86_64)	3m 25s
Test API 28 (x86)	3m 31s
Test API 28 (x86_64)	3m 42s
Test API 29 (x86)	3m 3s
Test API 29 (x86_64)	3m 12s
Test API 30 (x86)	5m 37s
Test API 30 (x86_64)	3m 52s
Test API 31 (x86_64)	4m 9s
Test API 32 (x86_64)	3m 54s
Test API 33 (x86_64)	3m 56s
Test API 34 (x86_64)	3m 58s
Test API 35 (x86_64)	4m 4s
	1h 52m 39s

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