Enable hwtest in canary for board wolf.

BUG=chrome-os-partner:23094
TEST=none

Change-Id: Ie7d0d4cedc3904fd9789d090dd14757811a88941
Previous-Reviewed-on: https://chromium-review.googlesource.com/174754
(cherry picked from commit f676b5930cc77bef37318a161d1d7f42f4a00b8b)
Reviewed-on: https://chromium-review.googlesource.com/176058
Reviewed-by: Fang Deng <fdeng@chromium.org>
Commit-Queue: Dan Shi <dshi@chromium.org>
Tested-by: Dan Shi <dshi@chromium.org>
diff --git a/buildbot/cbuildbot_config.py b/buildbot/cbuildbot_config.py
index 4037e31..c968da0 100755
--- a/buildbot/cbuildbot_config.py
+++ b/buildbot/cbuildbot_config.py
@@ -1568,8 +1568,6 @@
 
 _release.add_config('wolf-release',
   boards=['wolf'],
-  hw_tests=[],
-  vm_tests=None,
 )
 
 ### Arm release configs.