dbushelper: drop obsolete parameter from interface

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: Idebae41e021f54c3670cc22aa6c784549a361c23
diff --git a/dbus/dbusactiveread.cpp b/dbus/dbusactiveread.cpp
index b21922c..689a85d 100644
--- a/dbus/dbusactiveread.cpp
+++ b/dbus/dbusactiveread.cpp
@@ -31,7 +31,7 @@
     struct SensorProperties settings;
     double value;
 
-    _helper->getProperties(_bus, _service, _path, &settings);
+    _helper->getProperties(_service, _path, &settings);
 
     value = settings.value * pow(10, settings.scale);