Fix some swiftlint issues.

Tests/NetNewsWire-iOSTests/NetNewsWire_iOSTests.swift

@@ -9,27 +9,16 @@
 import XCTest
 
 class NetNewsWire_iOSTests: XCTestCase {
-    
+
-    override func setUp() {
-        super.setUp()
-        // Put setup code here. This method is called before the invocation of each test method in the class.
-    }
-    
-    override func tearDown() {
-        // Put teardown code here. This method is called after the invocation of each test method in the class.
-        super.tearDown()
-    }
-    
     func testExample() {
         // This is an example of a functional test case.
         // Use XCTAssert and related functions to verify your tests produce the correct results.
     }
-    
+
     func testPerformanceExample() {
         // This is an example of a performance test case.
         self.measure {
             // Put the code you want to measure the time of here.
         }
     }
-    
 }