Merge "Remove unused variable SKIP_BOOT_JARS_CHECK." am: 1b5262bd69 am: ab70bc55c5 am: 9620d3392d

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/1841576

Change-Id: Ia91b3157ac733aa548b049508b1f97fa2e253b68