Remove DMService from mainline_system

Doesn't exist in AOSP.

Bug: 110072687
Test: make
Change-Id: I516ff4d647e62b8535e9bf648a156b010a328e93
Merged-In: I516ff4d647e62b8535e9bf648a156b010a328e93
diff --git a/target/product/mainline_system.mk b/target/product/mainline_system.mk
index 4161064..e684036 100644
--- a/target/product/mainline_system.mk
+++ b/target/product/mainline_system.mk
@@ -27,7 +27,6 @@
 
 # Applications
 PRODUCT_PACKAGES += \
-    DMService \
     LiveWallpapersPicker \
     PartnerBookmarksProvider \
     PresencePolling \