Drop deps from BUCK's genrule

With recent BUCKs, the deps are implicit, and the deps parameter is
gone. With the deps parameter gone, building this plugin broke. Hence,
we invoke genrule without the deps parameter and let BUCK pick up the
dependencies automatically.

Change-Id: Ic3e0af97b3a40c48edd59d652649055e5b185d39

BUCK

diff --git a/BUCK b/BUCK
index ab276e5..d9f1b97 100644
--- a/BUCK
+++ b/BUCK
@@ -31,7 +31,6 @@
     name = name_zip,
     cmd = 'cp $SRCS $OUT && zip -qd $OUT ' + ' '.join(excludes),
     srcs = [ src ],
-    deps = [ src ],
     out = name_zip,
     visibility = visibility,
   )