Clean up Temperature::set_fans_paused

Marlin/src/module/temperature.h

@@ -405,7 +405,6 @@ class Temperature {
 
       #if ENABLED(PROBING_FANS_OFF)
         static bool fans_paused;
-        static uint8_t paused_fan_speed[FAN_COUNT];
       #endif
 
       static constexpr inline uint8_t fanPercent(const uint8_t speed) { return ui8_to_percent(speed); }