Drop the V1 plugin API compatibility code

Signed-off-by: Gergely Nagy <algernon@keyboard.io>

src/Kaleidoscope/LED-Stalker.cpp

@@ -139,20 +139,6 @@ cRGB Rainbow::compute(uint8_t *step) {
 
 }
 
-// Legacy V1 API
-#if KALEIDOSCOPE_ENABLE_V1_PLUGIN_API
-void StalkerEffect::setup(void) {
-  Kaleidoscope.useEventHandlerHook(legacyEventHandler);
-}
-
-Key StalkerEffect::legacyEventHandler(Key mapped_key, byte row, byte col, uint8_t key_state) {
-  EventHandlerResult r = ::StalkerEffect.onKeyswitchEvent(mapped_key, row, col, key_state);
-  if (r == EventHandlerResult::OK)
-    return mapped_key;
-  return Key_NoKey;
-}
-#endif
-
 }
 
 kaleidoscope::StalkerEffect StalkerEffect;

src/Kaleidoscope/LED-Stalker.h

@@ -38,23 +38,10 @@ class StalkerEffect : public LEDMode {
 
   EventHandlerResult onKeyswitchEvent(Key &mapped_key, byte row, byte col, uint8_t keyState);
 
-#if KALEIDOSCOPE_ENABLE_V1_PLUGIN_API
-  kaleidoscope::EventHandlerResult onSetup() {
-    ::LEDControl.mode_add(this);
-
-    return kaleidoscope::EventHandlerResult::OK;
-  }
-#endif
-
  protected:
   void onActivate(void) final;
   void update(void) final;
 
-#if KALEIDOSCOPE_ENABLE_V1_PLUGIN_API
-  void setup(void) final;
-  static Key legacyEventHandler(Key mapped_key, byte row, byte col, uint8_t key_state);
-#endif
-
  private:
   static uint16_t step_start_time_;
   static uint8_t map_[ROWS][COLS];