Remove redundant requirement for mime-types
Remove redundant requirement for mime-types

>= 2.0 is implied by ~> 2.0

sjchakrav/mechanize,eligoenergy/mechanize,jeremiahmarks/mechanize,uksa/mechanize,pwnall/mechanize,gchan/mechanize,flavorjones/mechanize,eligoenergy/mechanize,jeremiahmarks/mechanize,pwnall/mechanize,sparklemotion/mechanize,gchan/mechanize,bugmelody/mechanize,sparklemotion/mechanize,sjchakrav/mechanize,bugmelody/mechanize,uksa/mechanize