Drop the V1 plugin API compatibility code

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

src/Kaleidoscope-NumPad.cpp

@@ -75,18 +75,4 @@ kaleidoscope::EventHandlerResult NumPad_::afterEachCycle() {
   return kaleidoscope::EventHandlerResult::OK;
 }
 
-// Legacy V1 API
-#if KALEIDOSCOPE_ENABLE_V1_PLUGIN_API
-void NumPad_::begin() {
-  onSetup();
-  Kaleidoscope.useLoopHook(legacyLoopHook);
-}
-
-void NumPad_::legacyLoopHook(bool is_post_clear) {
-  if (!is_post_clear)
-    return;
-  NumPad.afterEachCycle();
-}
-#endif
-
 NumPad_ NumPad;

src/Kaleidoscope-NumPad.h

@@ -15,12 +15,6 @@ class NumPad_ : public kaleidoscope::Plugin {
   kaleidoscope::EventHandlerResult onSetup(void);
   kaleidoscope::EventHandlerResult afterEachCycle();
 
-#if KALEIDOSCOPE_ENABLE_V1_PLUGIN_API
- protected:
-  void begin();
-  static void legacyLoopHook(bool is_post_clear);
-#endif
-
  private:
   static byte row, col;
   static bool cleanupDone;