Remove invalid file reference of `Swift3to22.swift` from project.pbxproj
Remove invalid file reference of `Swift3to22.swift` from project.pbxproj

abbeycode/Nimble,dgdosen/Nimble,DanielAsher/Nimble,phatblat/Nimble,abbeycode/Nimble,dgdosen/Nimble,AnthonyMDev/Nimble,dgdosen/Nimble,phatblat/Nimble,Quick/Nimble,jeffh/Nimble,DanielAsher/Nimble,jeffh/Nimble,jeffh/Nimble,DanielAsher/Nimble,twobitlabs/Nimble,twobitlabs/Nimble,abbeycode/Nimble,abbeycode/Nimble,twobitlabs/Nimble,AnthonyMDev/Nimble,Quick/Nimble,AnthonyMDev/Nimble,jeffh/Nimble,dgdosen/Nimble,Quick/Nimble,phatblat/Nimble