Remove inexistent examples and update some Ruby SDK mistakes#8

DagonWat wants to merge 1 commit intomainmailtrap/mailtrap-openapi:mainfrom

MT-20066-review-current-open-api-specs-ruby-examplesmailtrap/mailtrap-openapi:MT-20066-review-current-open-api-specs-ruby-examplesCopy head branch name to clipboard