Remove timestamp hash from embed images

src/commands/challenge.rs

@@ -248,7 +248,7 @@ pub async fn submit(ctx: Context<'_>, submission: serenity::Attachment) -> Resul
                             .name(username)
                             .url(format!("https://discord.com/users/{}", author.id));
                         e.set_author(embed_author);
-                        e.image(format!("https://{domain}/{n}/{image}#{timestamp}"));
+                        e.image(format!("https://{domain}/{n}/{image}"));
                         if let Some(accent_color) = accent_color {
                             e.color(accent_color);
                         }