Buck: Gson is exported in the Plugin API now

Change-Id: Ib1ebe6cc8c8c99edc6e76d13d62ae64a0c4130b4
diff --git a/BUCK b/BUCK
index ebffb01..ea66a49 100644
--- a/BUCK
+++ b/BUCK
@@ -18,7 +18,6 @@
   ],
   provided_deps = [
     '//lib/commons:dbcp',
-    '//lib:gson',
   ]
 )