Restore fastboot delete-logical-partition command for VTS

1. delete-logical-partition was deleted
	- After merge "Don't require bootloader fastboot for VTS compliance." commit, delete-logical-partition sequence was deleted in LogicalPartitionCompliance test. "create-logical-partition failed" is occurred when run vts fastbootverification module. So restore this sequence.

Signed-off-by: Yongcheol LEE <yongcheol09.lee@lge.com>

Test: VTS
Test: run vts -m VtsFastbootVerification

Change-Id: I00366b281eafa5677b0941419a86f2702fb3484b
Merged-In: I00366b281eafa5677b0941419a86f2702fb3484b