libc++fs is part of libc++ now.

Change-Id: Ib8d5aa252fffec6a59c6c7daf642da45ffbf1330

Android.bp

diff --git a/Android.bp b/Android.bp
index 1b78971..68260b6 100644
--- a/Android.bp
+++ b/Android.bp
@@ -105,7 +105,6 @@
         "liblp",
         "libselinux",
         "libutils",
-        "libc++fs",
         "libvold_binder",
     ],
     header_libs: [