libbase: fix build breakage

Two changes were merged at the same time that conflicted.

Test: builds
Change-Id: Ia6c730804cd5a3b2655e6d69b8e4f346d198dabb
diff --git a/Android.bp b/Android.bp
index ae64f4d..a8dda5d 100644
--- a/Android.bp
+++ b/Android.bp
@@ -59,7 +59,6 @@
 
     cppflags: libbase_cppflags,
     shared_libs: ["liblog"],
-    header_libs: ["libutils_headers"],
     target: {
         android: {
             srcs: [