[cleanup] Remove unneeded microdroid_service_context in microdroid

As service_manager has been removed in microdroid.

Bug: 257260848
Test: atest MicrodroidTests MicrodroidHostTests
Change-Id: I2dafa2d8a6e0f8d2fd4f8a07028d988fc3f9fc6b
diff --git a/microdroid/Android.bp b/microdroid/Android.bp
index f2b223d..af6031a 100644
--- a/microdroid/Android.bp
+++ b/microdroid/Android.bp
@@ -83,7 +83,6 @@
         "microdroid_manifest",
         "microdroid_plat_sepolicy_and_mapping.sha256",
         "microdroid_property_contexts",
-        "microdroid_service_contexts",
         "mke2fs",
 
         // TODO(b/195425111) these should be added automatically