[Bleeding] Cleanup clone methods.

By: Wesley Wolfe <weswolf@aol.com>

paper-api/src/main/java/org/bukkit/material/SmoothBrick.java

@@ -45,4 +45,8 @@ public class SmoothBrick extends TexturedMaterial {
         return textures;
     }
 
+    @Override
+    public SmoothBrick clone() {
+        return (SmoothBrick) super.clone();
+    }
 }