sensors: don't pass excess conn handler

We don't need to pass connection handler to setInitialProperties method
since it already part of the sensor class.

Tested: no changes in behaviour.
Signed-off-by: Andrei Kartashev <a.kartashev@yadro.com>
Change-Id: Icaaccbeaf14e22648a6a1bce381f0f0a606b0ddd
diff --git a/src/IpmbSensor.cpp b/src/IpmbSensor.cpp
index 7c76d3b..0615c86 100644
--- a/src/IpmbSensor.cpp
+++ b/src/IpmbSensor.cpp
@@ -118,7 +118,7 @@
 void IpmbSensor::init(void)
 {
     loadDefaults();
-    setInitialProperties(dbusConnection, getSubTypeUnits());
+    setInitialProperties(getSubTypeUnits());
     if (initCommand)
     {
         runInitCmd();