Drop platform_apis from android_library

This property is a no-op for this module type.

Test: m nothing
Bug: 215379393
Change-Id: I73811c70c4191eb6005a5f365f0b1c149d30564b
diff --git a/Android.bp b/Android.bp
index 9599f9d..12752e1 100644
--- a/Android.bp
+++ b/Android.bp
@@ -47,7 +47,6 @@
 // Build the Settings APK
 android_library {
     name: "Settings-core",
-    platform_apis: true,
     defaults: [
         "SettingsLibDefaults",
         "SettingsLib-search-defaults",