Do not use our svnpoller, it's not ready yet

masters/master.chromium.fyi/master.cfg

Index: masters/master.chromium.fyi/master.cfg
diff --git a/masters/master.chromium.fyi/master.cfg b/masters/master.chromium.fyi/master.cfg
index 427241edab980bfa6d227748de0ba6d182779b08..dd9b5f58734433c6848a37a30a1d150c6564a288 100644
--- a/masters/master.chromium.fyi/master.cfg
+++ b/masters/master.chromium.fyi/master.cfg
@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 
 from buildbot import locks
+from buildbot.changes import svnpoller
 from buildbot.scheduler import Dependent
 from buildbot.scheduler import Nightly
 from buildbot.scheduler import Periodic
@@ -16,7 +17,6 @@ from master import failures_notifier
 from master import master_config
 from master import master_utils
 from master import slaves_list
-from master import svnpoller
 
 from master.factory import chromeos_factory
 from master.factory import chromium_factory