remove files

Pods/Headers/Private/mailcore2-ios/MailCore/MCData.h

.../Headers/Private/mailcore2-ios/MailCore/MCDateFormatter.h

Pods/Headers/Private/mailcore2-ios/MailCore/MCHTMLCleaner.h

...s/Private/mailcore2-ios/MailCore/MCHTMLRendererCallback.h

Pods/Headers/Private/mailcore2-ios/MailCore/MCHash.h

Pods/Headers/Private/mailcore2-ios/MailCore/MCHashMap.h

Pods/Headers/Private/mailcore2-ios/MailCore/MCICUTypes.h

Pods/Headers/Private/mailcore2-ios/MailCore/MCIMAP.h

...ate/mailcore2-ios/MailCore/MCIMAPAppendMessageOperation.h

...aders/Private/mailcore2-ios/MailCore/MCIMAPAsyncSession.h

...rivate/mailcore2-ios/MailCore/MCIMAPCapabilityOperation.h

...vate/mailcore2-ios/MailCore/MCIMAPCheckAccountOperation.h

...vate/mailcore2-ios/MailCore/MCIMAPCopyMessagesOperation.h

...ate/mailcore2-ios/MailCore/MCIMAPCustomCommandOperation.h

...vate/mailcore2-ios/MailCore/MCIMAPFetchContentOperation.h

...ailcore2-ios/MailCore/MCIMAPFetchContentToFileOperation.h

...vate/mailcore2-ios/MailCore/MCIMAPFetchFoldersOperation.h

...ate/mailcore2-ios/MailCore/MCIMAPFetchMessagesOperation.h

...te/mailcore2-ios/MailCore/MCIMAPFetchNamespaceOperation.h

...ailcore2-ios/MailCore/MCIMAPFetchParsedContentOperation.h