Remove dynamic partition allowlist check

If OEM's custom partitions directly apply to AVB-enabled A/B AOSP-defined partitions, and if those AOSP partitions are configured to be dynamic, that custom partitions should be dynamic as same as the others to catch up with AOSP partitions' changes when product is updated through OTA.
Remove valid dynamic partitions' list since that is no more necessary.

Bug: 238968263
Change-Id: Ic69f4ba58304110932b70d325cbb61ca8a5afee0