Add modernize-redundant-void-arg

Enable this check and fix the failures.

Change-Id: I89b13daf1161be40564367562bb9c8c0c459e1d0
Signed-off-by: Ed Tanous <ed@tanous.net>
diff --git a/src/sensor.hpp b/src/sensor.hpp
index b12c01a..7d22160 100644
--- a/src/sensor.hpp
+++ b/src/sensor.hpp
@@ -77,7 +77,7 @@
                             : nullptr)
     {}
     virtual ~Sensor() = default;
-    virtual void checkThresholds(void) = 0;
+    virtual void checkThresholds() = 0;
     std::string name;
     std::string configurationPath;
     std::string configInterface;