[5.7] Remove the last SPI use of _RegexParser symbols (#416)#417

natecook1000 merged 1 commit intoswiftlang:swift/release/5.7swiftlang/swift-experimental-string-processing:swift/release/5.7from

natecook1000:5.7/no_more_public_spinatecook1000/swift-experimental-string-processing:5.7/no_more_public_spiCopy head branch name to clipboard