Revert "Label dtbo partition as dtbo_block_device"

This reverts commit 3773ca269e96b1478b78e4345fce0359a8203167.

Reason for revert: b/319035582

Bug: 319035582
Test: boot
Change-Id: I3c2a5b5bc871aa506396c12d6e1fa036858c1273
2 files changed