Update inference_gfpgan.py

inference_gfpgan.py

@@ -27,7 +27,7 @@ def main():
     parser.add_argument(
         '-s', '--upscale', type=int, default=2, help='The final upsampling scale of the image. Default: 2')
     parser.add_argument(
-        '--bg_upsampler', type=str, default='realesrgan', help='background upsampler. Default: realesrgan')
+        '--bg_upsampler', type=str, default='', help='background upsampler. Default: realesrgan')
     parser.add_argument(
         '--bg_tile',
         type=int,