Remove marlin/sailfish specific sepolicy

Don't use sepolicy dir for marlin/sailfish.

Bug: 36231802
Test: aosp_arm64_ab should boot
Change-Id: I0e76841530cec2c51b61251ffde802bd7ec10663
diff --git a/target/board/generic_arm64_ab/BoardConfig.mk b/target/board/generic_arm64_ab/BoardConfig.mk
index 13f2820..4c57f31 100644
--- a/target/board/generic_arm64_ab/BoardConfig.mk
+++ b/target/board/generic_arm64_ab/BoardConfig.mk
@@ -85,10 +85,8 @@
 BOARD_NAND_SPARE_SIZE := 0
 BOARD_FLASH_BLOCK_SIZE := 512
 
-###############################################################################
-# Below are sailfish/marlin specific configs.
-# Must be moved after early-mount is supported.
-###############################################################################
-BOARD_SEPOLICY_DIRS += device/google/marlin/sepolicy
-
 BOARD_PROPERTY_OVERRIDES_SPLIT_ENABLED := true
+
+# TODO(b/36764215): remove this setting when the generic system image
+# no longer has QCOM-specific directories under /.
+BOARD_SEPOLICY_DIRS += build/target/board/generic_arm64_ab/sepolicy