Removes no longer needed guava dependency (#411)
Removes no longer needed guava dependency (#411)

Dependency was introduced in PR #395 and the only usage removed with
PR #403.
skaldarnar/TerasologyLauncher,MovingBlocks/TerasologyLauncher,skaldarnar/TerasologyLauncher,skaldarnar/TerasologyLauncher,MovingBlocks/TerasologyLauncher