Remove NetworkRecommendation from platform.

It no longer provides platform functionality, so can be removed.

Bug: 37357264,37686309
Test: make aosp_bullhead-userdebug and make bullhead-userdebug
Change-Id: Iedaa1dd764678f12eaeda292e6047485aae236ac
diff --git a/target/product/core.mk b/target/product/core.mk
index e563634..a6470ac 100644
--- a/target/product/core.mk
+++ b/target/product/core.mk
@@ -45,7 +45,6 @@
     Launcher2 \
     ManagedProvisioning \
     MtpDocumentsProvider \
-    NetworkRecommendation \
     PicoTts \
     PacProcessor \
     libpac \