# File lib/action_dispatch/http/mime_type.rb, line 195 def unregister(symbol) symbol = symbol.to_s.upcase mime = Mime.const_get(symbol) Mime.instance_eval { remove_const(symbol) } SET.delete_if { |v| v.eql?(mime) } LOOKUP.delete_if { |k,v| v.eql?(mime) } EXTENSION_LOOKUP.delete_if { |k,v| v.eql?(mime) } end