Add Data:performAtomic to lock a mutex while using a Data object.

src/modules/image/ImageData.cpp

@@ -764,11 +764,6 @@ void ImageData::paste(ImageData *src, int dx, int dy, int sx, int sy, int sw, in
 	}
 }
 
-love::thread::Mutex *ImageData::getMutex() const
-{
-	return mutex;
-}
-
 size_t ImageData::getPixelSize() const
 {
 	return getPixelFormatBlockSize(format);

src/modules/image/ImageData.h

@@ -110,8 +110,6 @@ public:
 	 **/
 	love::filesystem::FileData *encode(FormatHandler::EncodedFormat format, const char *filename, bool writefile) const;
 
-	love::thread::Mutex *getMutex() const;
-
 	// Implements ImageDataBase.
 	ImageData *clone() const override;
 	void *getData() const override;
@@ -142,8 +140,6 @@ private:
 	// The actual data.
 	unsigned char *data = nullptr;
 
-	love::thread::MutexRef mutex;
-
 	// The format handler that was used to decode the ImageData. We need to know
 	// this so we can properly delete memory allocated by the decoder.
 	StrongRef<FormatHandler> decodeHandler;