Revert "Add an external Vault dependency"

This reverts commit c86ffb623ac82ccf486be97b85f5da18c917bbd3.

Conflicts:
	src/main/java/com/Acrobot/ChestShop/Listeners/Economy/RegisterListener.java
	src/main/java/com/Acrobot/ChestShop/Listeners/Economy/VaultListener.java