Revert "Store the value from TARGET_OTA_ASSERT_DEVICE to a file"

This reverts commit 8605590ec626fa543160b62bb01dae55d00bb2f8.
Revert "build: Add support for PRODUCT_COPY_FILES_OVERRIDES"

This reverts commit 88c8b69e7cf223ccc23dde1c52adfb33becedc47.
hmmm