Bukkit/CraftBukkit — comment on commit 24a35fd22fa1170bccdcf9a8b48293d56305be9b
File: src/main/java/org/bukkit/craftbukkit/CraftServer.java line 836
By Wolvereness:

No, it's not mandatory, but it means next to nothing anyway. Erasure cleans it after compile, and it doesn't hurt as it is.