Don't use pad as FRP partition

In the current implementation of recovery, the pad parition is required
for sending commands and parameters from the system to recovery (see
uncrypt). Therefore, pad cannot be used for FRP, and FRP needs to work
without this partition.

Issue: FP2P-364
Change-Id: I272de52c9e3d5653484b29c397079a080b07ad3d
diff --git a/device.mk b/device.mk
index 68ead8a..6fe7430 100644
--- a/device.mk
+++ b/device.mk
@@ -89,8 +89,6 @@
 $(warning Build defined as $(BUILD_ID) ($(BUILD_NUMBER)))
 
 
-PRODUCT_PROPERTY_OVERRIDES += ro.frp.pst=/dev/block/platform/msm_sdcc.1/by-name/pad
-
 DEVICE_PACKAGE_OVERLAYS += device/fairphone/fp2-common/overlay
 
 # Do not enable data roaming by default