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: Ib3747851add301533a6f0c93d4be994a6e0d3eb6

BUCK

diff --git a/BUCK b/BUCK
index 941e49e..a21ca16 100644
--- a/BUCK
+++ b/BUCK
@@ -26,7 +26,6 @@
     name = name_zip,
     cmd = 'cp $SRCS $OUT && zip -qd $OUT ' + ' '.join(excludes),
     srcs = [ src ],
-    deps = [ src ],
     out = name_zip,
     visibility = visibility,
   )