Update hello world test to v1.1.0

It was determined [upstream] that the hello world excercise should be simplified
to always expect a return value of "Hello, World!".

[upstream]: exercism/problem-specifications#520

exercises/hello-world/example.el

@@ -4,10 +4,8 @@
 
 ;;; Code:
 
-(defun hello (&optional name)
-  "Say hello, optionally to NAME."
-  (let ((greetee (or name "World")))
-    (concat "Hello, " greetee "!")))
+(defun hello ()
+  "Hello, World!")
 
 (provide 'hello-world)
 ;;; hello-world.el ends here

exercises/hello-world/hello-world-test.el

@@ -1,18 +1,15 @@
 ;;; hello-world-test.el --- Tests for Hello World (exercism)
 
 ;;; Commentary:
+;; Common test data version: 1.1.0 be3ae66
 
 ;;; Code:
 
 (load-file "hello-world.el")
 
-(ert-deftest no-args ()
+(ert-deftest hello-world-test ()
   (should (equal (hello) "Hello, World!")))
 
-(ert-deftest with-args ()
-  (should (equal (hello "Emacs") "Hello, Emacs!"))
-  (should (equal (hello "Exercism") "Hello, Exercism!")))
-
 (provide 'hello-world-test)
 
 ;;; hello-world-test.el ends here