Remove ProximitySensorTools integration from device configuration

The ProximitySensorTools integration belongs in
vendor/fairphone/fp2-common instead.

Issue: FP2N-141
Change-Id: I4cf10d5c763535de54019219f7184d68c71197d9
Depends-On: I828d76f168477a8ee27ca36bc6823b6451f00cb1
diff --git a/device.mk b/device.mk
index a933812..c8b5341 100644
--- a/device.mk
+++ b/device.mk
@@ -270,10 +270,6 @@
 
 #    Snap
 
-# Proximity Calibration
-PRODUCT_PACKAGES += \
-    ProximitySensorTools
-
 # To increase security you can lock the device down using adb_keys
 # in order to generate this key use: cd common && adb keygen adb_keys
 # this key must be protected, since without ro.adb.secure=1, it is