Drop PRODUCT_INCLUDE_TAGS from banner vars

PRODUCT_INCLUDE_TAGS was previously used alongside
blueprint_package_include to prune Android.bp files from soong analysis.
With the deprecation of blueprint_package_includes, this product config
variable bcomes a noop and does not provide useful information in
banner.

Test: NA
Bug: 333316620
Change-Id: Id7a1465c06a45f12b4ecb1bf80decddb657adce2