Fix dtype parsing from vectorizer kwargs

[tylerhutcherson]

Fixing a bug in how we handled kwargs within the vectorizer classes after a recent change was introduced.

[rbs333]

Makes sense to me assuming we didn't have any other kwargs for process. Does seem like there's a need to run the linter tho

[tylerhutcherson]

Makes sense to me assuming we didn't have any other kwargs for process. Does seem like there's a need to run the linter tho

kwargs for the vectorizers are to be consumed by design by the client doing the vectorization. dtype however is reserved for the process_embedding helper, which does not need anything beyond the three explicit args. Thus, needs to get popped from the kwargs before processing.