hypervisor_state_manager: remove unused bus variable

New clang update found this bug so remove it.

Change-Id: Iff6d5bcd3eaa71734739bac7a6aa76833a3f0b03
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/hypervisor_state_manager.hpp b/hypervisor_state_manager.hpp
index 23e0979..b89865e 100644
--- a/hypervisor_state_manager.hpp
+++ b/hypervisor_state_manager.hpp
@@ -46,7 +46,6 @@
     Hypervisor(sdbusplus::bus_t& bus, const char* objPath) :
         HypervisorInherit(bus, objPath,
                           HypervisorInherit::action::emit_object_added),
-        bus(bus),
         bootProgressChangeSignal(
             bus,
             sdbusRule::propertiesChanged("/xyz/openbmc_project/state/host0",
@@ -83,9 +82,6 @@
      */
     void bootProgressChangeEvent(sdbusplus::message_t& msg);
 
-    /** @brief Persistent sdbusplus DBus bus connection. */
-    sdbusplus::bus_t& bus;
-
     /** @brief Watch BootProgress changes to know hypervisor state **/
     sdbusplus::bus::match_t bootProgressChangeSignal;
 };