Remove VNDK definition(s)

As of VNDK deprecation, any libraries that defines vndk is no longer
valid anymore. This change removes all VNDK definition(s) from modules
which was VNDK.

Bug: 328994089
Test: AOSP CF build succeeded
Change-Id: Ic3eb855bdeec320fa99c8ad6688eabd85985817f
diff --git a/Android.bp b/Android.bp
index 045924c..10268b0 100644
--- a/Android.bp
+++ b/Android.bp
@@ -20,9 +20,6 @@
     host_supported: true,
     vendor_available: true,
     product_available: true,
-    vndk: {
-        enabled: true,
-    },
     srcs: [
         "mixer.c",
         "mixer_hw.c",