Remove "Coqpit Field: " prefix from help messages

[reuben]

It pollutes the output and does not help the user in any way.

[erogol]

Don't you think this would cause to confuse arguments in and out of the coqpit?

[reuben]

What confusion does the "Coqpit Field: " prefix help clarify? If confusion is possible, the program author can clarify it themselves, with a prefix or any other means, in the help message.