Remove string assigned to map property

Blueprint property unpacking had a bug that silently ignored values
assigned to properties that expected a map.  Remove the incorrect
property so Blueprint can make it an error.

Test: m nothing
Bug: 177706602
Change-Id: I4cc6dfabe540e47eef9000b9c33474556570a9ff
diff --git a/android/Android.bp b/android/Android.bp
index ce103f0..2df9cdb 100644
--- a/android/Android.bp
+++ b/android/Android.bp
@@ -7,5 +7,4 @@
     ],
     lints: "android",
     clippy_lints: "android",
-    multilib: "first",
 }