remove(self, keyword, ignore_missing=False, remove_all=False)
The keyword of which to remove the first instance in the header.
When True, ignores missing keywords. Otherwise, if the keyword is not present in the header a KeyError is raised.
When True, all instances of keyword will be removed. Otherwise only the first instance of the given keyword is removed.
Removes the first instance of the given keyword from the header similar to :None:None:`list.remove` if the Header object is treated as a list of keywords.
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