dragon: remove proximity feature

Commit fa9da43 "sensors: Disable Proximity sensor" disabled the proximity sensor
in the HAL, but we also need to remove the feature.

Bug: 29574917

Change-Id: Ib2b9a26ee8eebe69de86eb7ed5eee86071234583
diff --git a/device.mk b/device.mk
index cae653a..7efaa97 100644
--- a/device.mk
+++ b/device.mk
@@ -91,7 +91,6 @@
     frameworks/native/data/etc/android.hardware.sensor.compass.xml:system/etc/permissions/android.hardware.sensor.compass.xml \
     frameworks/native/data/etc/android.hardware.sensor.gyroscope.xml:system/etc/permissions/android.hardware.sensor.gyroscope.xml \
     frameworks/native/data/etc/android.hardware.sensor.light.xml:system/etc/permissions/android.hardware.sensor.light.xml \
-    frameworks/native/data/etc/android.hardware.sensor.proximity.xml:system/etc/permissions/android.hardware.sensor.proximity.xml \
     frameworks/native/data/etc/android.software.midi.xml:system/etc/permissions/android.software.midi.xml \
     frameworks/native/data/etc/android.software.verified_boot.xml:system/etc/permissions/android.software.verified_boot.xml \
     frameworks/native/data/etc/android.hardware.vulkan.level-1.xml:system/etc/permissions/android.hardware.vulkan.level.xml \