General: Rename `remove_option_allowed_list()` to `remove_allowed_options()`.

This was missed in [48142] which renamed `add_option_allowed_list()` to `add_allowed_options()` for better readability. The two functions should have consistent names.

See #50413.
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git-svn-id: https://core.svn.wordpress.org/trunk@48328 1a063a9b-81f0-0310-95a4-ce76da25c4cd