Overload set params_ref::erase

params_base::iterator
erase(params_base::iterator pos) noexcept;
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params_base::iterator
erase(
    params_base::iterator first,
    params_base::iterator last) noexcept;
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size_t
erase(
    string_view key,
    ignore_case_param ic = = {}) noexcept;
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