Cleanup.

src/image_decode.cpp

@@ -647,7 +647,10 @@ namespace bimg
 
 				for (uint32_t ii = 0; err.isOk() && ii < numEntries; ++ii)
 				{
-					// https://sno.phy.queensu.ca/~phil/exiftool/TagNames/EXIF.html
+					// Reference(s):
+					// - EXIF Tags
+					//   https://web.archive.org/web/20190218005249/https://sno.phy.queensu.ca/~phil/exiftool/TagNames/EXIF.html
+					//
 					uint16_t tag;
 					bx::readHE(&reader, tag, littleEndian, &err);