That's not exactly how it works. If it didn't exist in the client, it would be impossible to display to the player. Essentials is merely a server-side plugin.
I never said it did not exist in the client. The quiver is still in the game but it is unused now. Same as "Monster" or Herobrine.
The quiver's texture exists, but it is assigned no item id and therefore entirely unattainable. It was never implemented: Herobrine never was in the client- Herobrine is a joke:
I NEVER said that the quiver was possible to obtain. I simply used an example that the quiver got removed like Monster or Herobrine. Edit: And you obviously don't know much of minecraft. The quiver was used to count arrows long ago in Indev.