Removing the workaround of public product sepolicy dir

system/sepolicy now allows PRODUCT_PUBLIC_SEPOLICY_DIRS to be empty.
Removing the workaround.te file and the directory.

Bug: 131193755
Test: lunch aosp_cf_x86_64_phone-userdebug, then mmma system/sepolicy
Change-Id: Idac746d2ca9e9a975d26694151ee04190410d4ae
2 files changed