The wilderness 4 sword hasn't been removed, if you've lost or destroyed, it can be reclaimed from Kolodion or Mr Ex for 100k
If you're asking about the cosmetic one, it should still be in your wardrobe. If not, check your filter settings to make sure you're not filtering it by mistake
sorry my fault i tought i keepsaked that weapon and tought jagax removed that weapon in keepsake slots but its not its was a automatic overide main weapon filter in wardrobes sorry my bad