Drop the V1 plugin API compatibility code

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

src/Kaleidoscope/OneShot.cpp

@@ -268,29 +268,6 @@ void OneShot::cancel(bool with_stickies) {
   should_cancel_stickies_ = with_stickies;
 }
 
-// Legacy V1 API
-#if KALEIDOSCOPE_ENABLE_V1_PLUGIN_API
-void OneShot::begin() {
-  Kaleidoscope.useEventHandlerHook(legacyEventHandler);
-  Kaleidoscope.useLoopHook(legacyLoopHook);
-}
-
-Key OneShot::legacyEventHandler(Key mapped_key, byte row, byte col, uint8_t key_state) {
-  EventHandlerResult r = ::OneShot.onKeyswitchEvent(mapped_key, row, col, key_state);
-  if (r == EventHandlerResult::OK)
-    return mapped_key;
-  return Key_NoKey;
-}
-
-void OneShot::legacyLoopHook(bool is_post_clear) {
-  if (is_post_clear) {
-    ::OneShot.afterEachCycle();
-  } else {
-    ::OneShot.beforeReportingState();
-  }
-}
-#endif
-
 }
 
 kaleidoscope::OneShot OneShot;

src/Kaleidoscope/OneShot.h

@@ -57,17 +57,6 @@ class OneShot : public kaleidoscope::Plugin {
 
   void inject(Key mapped_key, 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);
-  static void legacyLoopHook(bool is_post_clear);
-#endif
-
  private:
   typedef union {
     struct {