remove unnecessary SDL2 include

[skip ci]

source/application/StarApplicationController.hpp

@@ -54,6 +54,7 @@ public:
   virtual bool openAudioInputDevice(const char* name, int freq, int channels, void* userdata, AudioCallback callback) = 0;
   virtual bool closeAudioInputDevice() = 0;
 
+  virtual bool hasClipboard() = 0;
   virtual void setClipboard(String text) = 0;
   virtual Maybe<String> getClipboard() = 0;
 

source/application/StarMainApplication_sdl.cpp

@@ -481,6 +481,10 @@ private:
     Controller(SdlPlatform* parent)
       : parent(parent) {}
 
+    bool hasClipboard() override {
+      return SDL_HasClipboardText();
+    }
+
     Maybe<String> getClipboard() override {
       Maybe<String> string;
       if (SDL_HasClipboardText()) {

source/frontend/StarClipboardLuaBindings.cpp

@@ -1,14 +1,14 @@
 #include "StarClipboardLuaBindings.hpp"
 #include "StarLuaConverters.hpp"
 
-#include "SDL2/SDL.h"
-
 namespace Star {
 
 LuaCallbacks LuaBindings::makeClipboardCallbacks(ApplicationControllerPtr appController) {
   LuaCallbacks callbacks;
 
-  callbacks.registerCallback("hasText", []() -> bool { return SDL_HasClipboardText() == SDL_TRUE;});
+  callbacks.registerCallback("hasText", [appController]() -> bool {
+    return appController->hasClipboard();
+  });
 
   callbacks.registerCallback("getText", [appController]() -> Maybe<String> {
     return appController->getClipboard();
@@ -21,4 +21,4 @@ LuaCallbacks LuaBindings::makeClipboardCallbacks(ApplicationControllerPtr appCon
   return callbacks;
 };
 
-}// namespace Star
+}