Fix SwiftLint violations

Sources/PersistentToken.swift

@@ -34,12 +34,6 @@ public struct PersistentToken: Equatable, Hashable {
     /// The keychain's persistent identifier for the saved token.
     public let identifier: Data
 
-    /// Initializes a new `PersistentToken` with the given properties.
-    internal init(token: Token, identifier: Data) {
-        self.token = token
-        self.identifier = identifier
-    }
-
     /// Hashes the persistent token's identifier into the given hasher, providing `Hashable` conformance.
     public func hash(into hasher: inout Hasher) {
         // Since we expect every `PersistentToken`s identifier to be unique, the identifier's hash

Tests/EquatableTests.swift

@@ -56,7 +56,7 @@ class EquatableTests: XCTestCase {
 
     func testGeneratorEquality() throws {
         let generator = try Generator(factor: .counter(0), secret: Data(), algorithm: .sha1, digits: 6)
-        let badData = "0".data(using: String.Encoding.utf8)!
+        let badData = Data("0".utf8)
 
         XCTAssert(try generator == Generator(factor: .counter(0), secret: Data(), algorithm: .sha1, digits: 6))
         XCTAssert(try generator != Generator(factor: .counter(1), secret: Data(), algorithm: .sha1, digits: 6))

Tests/KeychainTests.swift

@@ -257,7 +257,7 @@ class KeychainTests: XCTestCase {
     }
 
     func testBadData() throws {
-        let badData = " ".data(using: .utf8)!
+        let badData = Data(" ".utf8)
 
         let keychainAttributes: [String: AnyObject] = [
             kSecAttrGeneric as String:  badData as NSData,
@@ -275,7 +275,7 @@ class KeychainTests: XCTestCase {
     }
 
     func testBadURL() throws {
-        let badData = "http://example.com".data(using: .utf8)!
+        let badData = Data("http://example.com".utf8)
 
         let keychainAttributes: [String: AnyObject] = [
             kSecAttrGeneric as String:  badData as NSData,