Remove test script that is no longer relevant

Before when the VNDK snapshot make target used to depend on the
phony targets of the VNDK libraries (e.g. libui.vendor), each
built library was installed under
out/target/product/{product}/system/lib*. However, vndk packaging
have since been changed to depend on the actual built files under
obj/*, and thus the VNDK snapshot target itself does not install
libs to /system/lib*. The testing logic in test.sh which compares
the VNDK snapshot zip file with the libs installed under
/system/lib* is now obsolete. For now there is no meaningful
alternative way to test the correct packaging without being
redundant.

Test: development/vndk/snapshot/build.sh
Change-Id: Ia8d9ef80541f80094c979ab80fd161386e30f916