Drop the V1 plugin compatibility code

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

src/Kaleidoscope/GhostInTheFirmware.cpp

@@ -70,20 +70,6 @@ EventHandlerResult GhostInTheFirmware::beforeReportingState() {
   return EventHandlerResult::OK;
 }
 
-// Legacy V1 API
-#if KALEIDOSCOPE_ENABLE_V1_PLUGIN_API
-void GhostInTheFirmware::begin() {
-  Kaleidoscope.useLoopHook(legacyLoopHook);
-}
-
-void GhostInTheFirmware::legacyLoopHook(bool is_post_clear) {
-  if (is_post_clear)
-    return;
-
-  ::GhostInTheFirmware.beforeReportingState();
-}
-#endif
-
 };
 
 kaleidoscope::GhostInTheFirmware GhostInTheFirmware;

src/Kaleidoscope/GhostInTheFirmware.h

@@ -37,16 +37,6 @@ class GhostInTheFirmware : public kaleidoscope::Plugin {
 
   EventHandlerResult beforeReportingState();
 
-#if KALEIDOSCOPE_ENABLE_V1_PLUGIN_API
-  kaleidoscope::EventHandlerResult onSetup() {
-    return kaleidoscope::EventHandlerResult::OK;
-  }
-
- protected:
-  void begin();
-  static void legacyLoopHook(bool is_post_clear);
-#endif
-
  private:
   static bool is_active_;
   static bool is_pressed_;