Drop the V1 plugin API compatibility code

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

src/Kaleidoscope/HostPowerManagement.cpp

@@ -54,20 +54,6 @@ EventHandlerResult HostPowerManagement::beforeEachCycle() {
   return EventHandlerResult::OK;
 }
 
-// Legacy V1 API
-#if KALEIDOSCOPE_ENABLE_V1_PLUGIN_API
-void HostPowerManagement::begin() {
-  Kaleidoscope.useLoopHook(legacyLoopHook);
-}
-
-void HostPowerManagement::legacyLoopHook(bool is_post_clear) {
-  if (is_post_clear)
-    return;
-
-  ::HostPowerManagement.beforeEachCycle();
-}
-#endif
-
 }
 
 __attribute__((weak)) void hostPowerManagementEventHandler(kaleidoscope::HostPowerManagement::Event event) {

src/Kaleidoscope/HostPowerManagement.h

@@ -40,16 +40,6 @@ class HostPowerManagement : public kaleidoscope::Plugin {
 
   EventHandlerResult beforeEachCycle();
 
-#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 was_suspended_;
   static bool initial_suspend_;