Follow up to 'Merge branch 'stable-3.1' into master'

Fix call to 'gerrit_api' so that it is not getting '3.3.0-SNAPSHOT'
verison explicitly but relies on bazlets.

Change-Id: I6b1762af8eae75ceecc8cad879ae78e22e0c3831

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index 94d396d..d8eeab5 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -12,4 +12,4 @@
     "gerrit_api",
 )
 
-gerrit_api(version = "3.3.0-SNAPSHOT")
+gerrit_api()