Remove aggregator, fix changing HWMON paths

Add logic to use actual device paths for the PWM sensors instead of their
standart HWMON paths.

This was done after noticing that due to the load order of kernel modules,
the index of HWMON paths could change.

app/include/fan/FanCurve.h

@@ -23,7 +23,6 @@ public:
   void DoFanControl();
 
 private:
-  int AggregateTemperature();
   void PrintInfo();
   bool ExceedsHysteresis(int temperature);
   void ApplyFanPower(std::shared_ptr<Fan> fan, int targetFanPower);