Revert "[MM-29224] Fix bug where markdown image link doesn't show preview (#15862)" (#16326)

This reverts commit 07948ae7bc.

app/post_metadata.go

@@ -318,10 +318,6 @@ func getFirstLinkAndImages(str string) (string, []string) {
 			if firstLink == "" {
 				firstLink = v.Destination()
 			}
-		case *markdown.InlineLink:
-			if firstLink == "" {
-				firstLink = v.Destination()
-			}
 		case *markdown.InlineImage:
 			images = append(images, v.Destination())
 		case *markdown.ReferenceImage: