Remove unusued inplace param from gibbs_removal()

[tashrifbillah]

Closes issue #2754

[skoudoro]

Hi @tashrifbillah,

Thank you cleaning up!

You might need to update test files and tutorials.
Also, we need to give time to user to remove this parameter from their script.

So, you need to keep the variable and the code, and add it as a deprecated parameter
something like:

@deprecated_params(['num_threads', 'inplace'], ['num_processes', None], since='1.4', until='1.8')

[skoudoro]

closing in favor of my last comment here