Is "also" redundant?

Who’s that witch? ‘Who’, ‘whom’, ‘whose’, ‘that’, and ‘which’ are funny pronouns called relative pronouns. They serve an added function of also being a subordinating conjunction, subordinating an adjective clause (explaining the noun before it). Imagine a sentence like this: I saw the man he gave me a dollar. The sentence is missing a conjunction …

Is "also" redundant?

Thanks.