Revert "Add FolderUID for library elements" (#83776)

Revert "Add FolderUID for library elements (#79572)"

This reverts commit 2532047e7a.

pkg/services/libraryelements/database.go

@@ -149,20 +149,14 @@ func (l *LibraryElementService) createLibraryElement(c context.Context, signedIn
 	}
 
 	metrics.MFolderIDsServiceCount.WithLabelValues(metrics.LibraryElements).Inc()
-	// folderUID *string will be changed to string
-	var folderUID string
-	if cmd.FolderUID != nil {
-		folderUID = *cmd.FolderUID
-	}
 	element := model.LibraryElement{
-		OrgID:     signedInUser.GetOrgID(),
-		FolderID:  cmd.FolderID, // nolint:staticcheck
-		FolderUID: folderUID,
-		UID:       createUID,
-		Name:      cmd.Name,
-		Model:     updatedModel,
-		Version:   1,
-		Kind:      cmd.Kind,
+		OrgID:    signedInUser.GetOrgID(),
+		FolderID: cmd.FolderID, // nolint:staticcheck
+		UID:      createUID,
+		Name:     cmd.Name,
+		Model:    updatedModel,
+		Version:  1,
+		Kind:     cmd.Kind,
 
 		Created: time.Now(),
 		Updated: time.Now(),