Move getInvService() into utility function.

Resolves openbmc/openbmc#1299

Change-Id: I61f511dcc15e67393a47bd0395b752d2e6f17f11
Signed-off-by: Brandon Wyman <bjwyman@gmail.com>
diff --git a/fan_enclosure.hpp b/fan_enclosure.hpp
index 1c8d241..8f5cfdf 100644
--- a/fan_enclosure.hpp
+++ b/fan_enclosure.hpp
@@ -97,13 +97,7 @@
          * @return Current presence state determined from all sensors
          */
         presenceState getCurPresState();
-        //TODO openbmc/openbmc#1299 - Move getInvService() to a utility file
-        /**
-         * @brief Get the inventory service name from the mapper object
-         *
-         * @return The inventory manager service name
-         */
-        std::string getInvService();
+
         /**
          * @brief Construct the inventory object map
          *