Remove unneeded sepolicy rules.

These are now included in the core sepolicy. Additionally, configure
cuttlefish as if it were a retrofit device, so super_block_device_type
is system_block_device.

Bug: 132943965
Test: sideload OTA on cuttlefish
Change-Id: I8906bab51f1b8e66b8aa3c0aed6bce51cc038ffb
Merged-In: I8906bab51f1b8e66b8aa3c0aed6bce51cc038ffb