[fbsync] Fix compilation error when there is no libjpeg (#8342)

Summary: Co-authored-by: vfdev <vfdev.5@gmail.com>

Reviewed By: vmoens

Differential Revision: D57099457

fbshipit-source-id: c6b60c9f830231941bea954df925aa6ed1f0c4c8

torchvision/csrc/io/image/cpu/exif.h

@@ -196,10 +196,6 @@ inline int fetch_jpeg_exif_orientation(j_decompress_ptr cinfo) {
 
   return fetch_exif_orientation(exif_data_ptr, size);
 }
-#else // #if JPEG_FOUND
-inline int fetch_jpeg_exif_orientation(j_decompress_ptr cinfo) {
-  return -1;
-}
 #endif // #if JPEG_FOUND
 
 #if PNG_FOUND && defined(PNG_eXIf_SUPPORTED)
@@ -217,10 +213,6 @@ inline int fetch_png_exif_orientation(png_structp png_ptr, png_infop info_ptr) {
   }
   return -1;
 }
-#else // #if PNG_FOUND && defined(PNG_eXIf_SUPPORTED)
-inline int fetch_png_exif_orientation(png_structp png_ptr, png_infop info_ptr) {
-  return -1;
-}
 #endif // #if PNG_FOUND && defined(PNG_eXIf_SUPPORTED)
 
 constexpr uint16_t IMAGE_ORIENTATION_TL = 1; // normal orientation