Drop the V1 plugin API compatibility code

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

src/Kaleidoscope/Redial.cpp

@@ -48,20 +48,6 @@ __attribute__((weak)) bool Redial::shouldRemember(Key mapped_key) {
   return false;
 }
 
-// Legacy V1 API
-#if KALEIDOSCOPE_ENABLE_V1_PLUGIN_API
-void Redial::begin() {
-  Kaleidoscope.useEventHandlerHook(legacyEventHandler);
-}
-
-Key Redial::legacyEventHandler(Key mapped_key, byte row, byte col, uint8_t key_state) {
-  EventHandlerResult r = ::Redial.onKeyswitchEvent(mapped_key, row, col, key_state);
-  if (r == EventHandlerResult::OK)
-    return mapped_key;
-  return Key_NoKey;
-}
-#endif
-
 }
 
 kaleidoscope::Redial Redial;

src/Kaleidoscope/Redial.h

@@ -32,16 +32,6 @@ class Redial : public KaleidoscopePlugin {
 
   EventHandlerResult onKeyswitchEvent(Key &mapped_key, byte row, byte col, uint8_t key_state);
 
-#if KALEIDOSCOPE_ENABLE_V1_PLUGIN_API
-  kaleidoscope::EventHandlerResult onSetup() {
-    return kaleidoscope::EventHandlerResult::OK;
-  }
-
- protected:
-  void begin();
-  static Key legacyEventHandler(Key mapped_key, byte row, byte col, uint8_t key_state);
-#endif
-
  private:
   static Key key_to_redial_;
 };