clang-tidy: Fix Unused Variable Warnings

The following errors were reported during clang-tidy enablement due
to multiple unused variables.

'''
ipmi/dbus_mode.cpp:37:23: error: unused variable 'failsafeProperty' [-Werror
ipmi/dbus_mode.cpp:36:23: error: unused variable 'manualProperty' [-Werror
'''

This fix removes the unused variables to resolve the warnings.

Tested: Build and unit testing verified.

Change-Id: I3abf76b57b939df5cbeb4c71b7063705fe0ff3a8
Signed-off-by: Jayanth Othayoth <ojayanth@gmail.com>
diff --git a/ipmi/dbus_mode.cpp b/ipmi/dbus_mode.cpp
index d109ae1..c72a00a 100644
--- a/ipmi/dbus_mode.cpp
+++ b/ipmi/dbus_mode.cpp
@@ -33,8 +33,6 @@
 static constexpr auto objectPath = "/xyz/openbmc_project/settings/fanctrl/zone";
 static constexpr auto busName = "xyz.openbmc_project.State.FanCtrl";
 static constexpr auto intf = "xyz.openbmc_project.Control.Mode";
-static constexpr auto manualProperty = "Manual";
-static constexpr auto failsafeProperty = "FailSafe";
 static constexpr auto propertiesintf = "org.freedesktop.DBus.Properties";
 
 using Property = std::string;