Make the tranquilizer rifle less lethal

[Roomba]

Yeah, removing the bleeding/brute damage would go a long way to improve it. Allowing it to fire any chem would make it far more lethal, not less. Sure, you could argue that non-antags wouldn't abuse it, but frankly I think we all know that every other round assistants would be filled with ??? pill and Dan's soup for the crime of standing around in medbay while the MD was bored.