remove unused extension function

@@ -8,31 +8,6 @@ extension CVBuffer {
         let cgImage = CIContext().createCGImage(ciImage, from: ciImage.extent)
         return UIImage(cgImage: cgImage!)
     }
-    
-    var image1: UIImage {
-        // Lock the base address of the pixel buffer
-        CVPixelBufferLockBaseAddress(self, CVPixelBufferLockFlags.readOnly)
-        // Get the number of bytes per row for the pixel buffer
-        let baseAddress = CVPixelBufferGetBaseAddress(self)
-        // Get the number of bytes per row for the pixel buffer
-        let bytesPerRow = CVPixelBufferGetBytesPerRow(self)
-        // Get the pixel buffer width and height
-        let width = CVPixelBufferGetWidth(self)
-        let height = CVPixelBufferGetHeight(self)
-        // Create a device-dependent RGB color space
-        let colorSpace = CGColorSpaceCreateDeviceRGB()
-        // Create a bitmap graphics context with the sample buffer data
-        var bitmapInfo = CGBitmapInfo.byteOrder32Little.rawValue
-        bitmapInfo |= CGImageAlphaInfo.premultipliedFirst.rawValue & CGBitmapInfo.alphaInfoMask.rawValue
-        //let bitmapInfo: UInt32 = CGBitmapInfo.alphaInfoMask.rawValue
-        let context = CGContext(data: baseAddress, width: width, height: height, bitsPerComponent: 8, bytesPerRow: bytesPerRow, space: colorSpace, bitmapInfo: bitmapInfo)
-        // Create a Quartz image from the pixel data in the bitmap graphics context
-        let quartzImage = context?.makeImage()
-        // Unlock the pixel buffer
-        CVPixelBufferUnlockBaseAddress(self, CVPixelBufferLockFlags.readOnly)
-        // Create an image object from the Quartz image
-        return  UIImage(cgImage: quartzImage!)
-    }
 }
 
 extension UIDeviceOrientation {