Remove unused test files + fix test

Author: alextwoods

codegen/src/test/java/software/amazon/awssdk/codegen/poet/model/SharedStreamAwsModelSpecTest.java

@@ -52,15 +52,15 @@ public SharedStreamAwsModelSpecTest(ShapeModel shapeModel) {
     }
 
     @Test
-    public void basicGeneration() throws Exception {
+    public void basicGeneration() {
         assertThat(new AwsServiceModel(intermediateModel, shapeModel), generatesTo(referenceFileForShape()));
     }
 
     private String referenceFileForShape() {
         return "sharedstream/" + shapeModel.getShapeName().toLowerCase(Locale.ENGLISH) + ".java";
     }
 
-    private static void setUp() throws IOException {
+    private static void setUp() {
         File serviceModelFile = new File(SharedStreamAwsModelSpecTest.class.getResource("sharedstream/service-2.json").getFile());
         ServiceModel serviceModel = ModelLoaderUtils.loadModel(ServiceModel.class, serviceModelFile);