Drop MIME::Types monkey patch.
Drop MIME::Types monkey patch.

There still isn't exactly a direct way to look up MIME types by
extension, but we don't need one.

landylee1989/rest-client,taoza/rest-client,skv-headless/rest-client,jonkgrimes/rest-client,crccw/rest-client,ab/rest-client,JIFFinc/rest-client,keir-rex/rest-client,acrogenesis-lab/rest-client,rest-client/rest-client,antonklava/rest-client,rayzhng/rest-client,voxik/rest-client,korczis/rest-client,guoyu07/rest-client,maxprig/rest-client