radio@1.5: update makefiles

To be consistent w/ hidl-gen output.

Bug: N/A
Test: N/A
Change-Id: Ic4bd68777e74e5cdfc222202398923d34125f2af
diff --git a/radio/1.5/Android.bp b/radio/1.5/Android.bp
index 06a2a6e..de9ec6e 100644
--- a/radio/1.5/Android.bp
+++ b/radio/1.5/Android.bp
@@ -19,7 +19,6 @@
         "android.hardware.radio@1.3",
         "android.hardware.radio@1.4",
         "android.hidl.base@1.0",
-        "android.hidl.safe_union@1.0",
     ],
     gen_java: true,
 }