figments: command: rewrite command api to use Task instances instead of static functions

src/animations/Power.cpp

@@ -30,26 +30,6 @@ doForceBrightness(Args& args, Print& out)
   Static<Power>::instance()->forceBrightness(newBrightness);
 }
 
-void
-Power::forceBrightness(uint8_t v)
-{
-  m_forced = true;
-  FastLED.setBrightness(v);
-}
-
-const std::vector<Command> _commands = {
-  {"brightness", doBrightness},
-  {"brightness-force", doForceBrightness},
-  {"on", doOn},
-  {"off", doOff}
-};
-
-const std::vector<Command>&
-Power::commands() const
-{
-  return _commands;
-}
-
 void
 Power::handleConfigChange(const Configuration& config)
 {

src/animations/Power.h

@@ -53,9 +53,6 @@ public:
     }
 
     void forceBrightness(uint8_t v);
-
-    const std::vector<Command>& commands() const override;
-
 private:
     AnimatedNumber m_powerState = 255;
     AnimatedNumber m_brightness = 255;