Drop legacy check_dynamic_partitions [1/2]

It's only required on legacy OTA client on Android 9 and earlier, which
"can't tell the difference between a retrofit OTA package and a regular
full OTA package", according to the AOSP docs.

Issue: FP3-A11#146
Change-Id: I63cc5877cccc72643a764f42cff1f7c159874283
1 file changed