test: removed non-thrown declared IOexception from method signature (#…

…2745)

gradle-plugin/kubernetes/src/test/java/org/eclipse/jkube/gradle/plugin/task/KubernetesResourceTaskTest.java

@@ -38,7 +38,7 @@ class KubernetesResourceTaskTest {
   public final TaskEnvironmentExtension taskEnvironment = new TaskEnvironmentExtension();
 
   @BeforeEach
-  void setUp() throws IOException {
+  void setUp() {
     when(taskEnvironment.project.getExtensions().getByType(KubernetesExtension.class))
         .thenReturn(new TestKubernetesExtension());
   }