nx: Remove irrelevant power brick property

* Only used on Shield devices.

Change-Id: Ic91eb785d515ea19f8cc574a26506c25ff9744bc

properties.mk

@@ -10,10 +10,6 @@ PRODUCT_PROPERTY_OVERRIDES += \
 PRODUCT_SYSTEM_PROPERTY_OVERRIDES += \
     persist.sys.NV_ECO.IF.CHARGING=false
 
-# Power brick info
-PRODUCT_PROPERTY_OVERRIDES += \
-    persist.vendor.power.brick=PB1000
-
 # USB configfs
 PRODUCT_PROPERTY_OVERRIDES += \
     vendor.sys.usb.udc=700d0000.xudc \