Removing Question and Answer service

It was sunset a while back.

I also changed the watson.message_resonance and .question_and_answer properties to be non-enumerable so that they will still throw a clear error if you try to use them, but don't show up in docs or a list of the avaliable services.

Fixes watson-developer-cloud#215

Author: nfriedly

README.md

@@ -29,7 +29,6 @@ APIs and SDKs that use cognitive computing to solve complex problems.
     * [Language Translation](#language-translation)
     * [Natural Language Classifier](#natural-language-classifier)
     * [Personality Insights](#personality-insights)
-    * [Question and Answer](#question-and-answer)
     * [Relationship Extraction](#relationship-extraction)
     * [Retrieve and Rank](#retrieve-and-rank)
     * [Speech to Text](#speech-to-text)
@@ -388,29 +387,6 @@ personality_insights.profile({
 
 **Note:** Don't forget to update the `text` variable!
 
-### Question and Answer
-Ask a healthcare-related question of the
-[Question and Answer][question_and_answer] service.
-
-```javascript
-var watson = require('watson-developer-cloud');
-
-var question_and_answer_healthcare = watson.question_and_answer({
-  username: '<username>',
-  password: '<password>',
-  version: 'v1-beta',
-  dataset: 'healthcare' /* The dataset can be specified when creating
-                         * the service or when calling it */
-});
-
-question_and_answer_healthcare.ask({
-  text: 'What is HIV?'}, function (err, response) {
-    if (err)
-      console.log('error:', err);
-    else
-      console.log(JSON.stringify(response, null, 2));
-});
-```
 
 ### Relationship Extraction
 Analyze an English news article and get the relationships between sentence
@@ -706,7 +682,6 @@ This library is licensed under Apache 2.0. Full license text is available in
 See [CONTRIBUTING](https://github.com/watson-developer-cloud/node-sdk/blob/master/.github/CONTRIBUTING.md).
 
 
-[question_and_answer]: http://www.ibm.com/smarterplanet/us/en/ibmwatson/developercloud/doc/qaapi/
 [personality_insights]: http://www.ibm.com/smarterplanet/us/en/ibmwatson/developercloud/doc/personality-insights/
 [concept_expansion]: http://www.ibm.com/smarterplanet/us/en/ibmwatson/developercloud/doc/glimpseapi/
 [relationship_extraction]: http://www.ibm.com/smarterplanet/us/en/ibmwatson/developercloud/doc/sireapi/

examples/question_and_answer.v1-beta.js

@@ -106,13 +106,6 @@ function createServiceAPI(serviceName) {
         if (serviceName === 'search') {
           throw new Error('The search service has been replaced by retrieve_and_rank');
         }
-        if (serviceName === 'message_resonance') {
-          throw new Error('The message_resonance service is no longer available');
-        }
-        if (serviceName === 'question_and_answer') {
-          console.log('The question_and_answer service is deprecated'); // eslint-disable-line no-console
-        }
-
         if (serviceName === 'tone_analyzer' && path.basename(version) === 'v1') {
           throw new Error('tone_analyzer v1 has been replaced by v2-experimental');
         }
@@ -147,13 +140,6 @@ var watson = {
    */
   concept_expansion: createServiceAPI('concept_expansion'),
 
-  /**
-   * @function
-   * @param {{}} options
-   * @returns  {QuestionAndAnswer}
-   */
-  question_and_answer: createServiceAPI('question_and_answer'),
-
   /**
    * @function
    * @param {{}} options
@@ -268,14 +254,6 @@ var watson = {
    */
   search: createServiceAPI('search'),
 
-  /**
-   * @function
-   * @param {{}} options
-   * @returns  {MessageResonance}
-   * @deprecated
-   */
-  message_resonance: createServiceAPI('message_resonance'),
-
   // alchemy
   /**
    * @function
@@ -296,9 +274,21 @@ var watson = {
    * @param {{}} options
    * @returns  {AlchemyDataNews}
    */
-  alchemy_data_news: createServiceAPI('alchemy_data_news')
+  alchemy_data_news: createServiceAPI('alchemy_data_news'),
 };
 
-
+// removed services
+// we don't want these services listed (so non-enumerable), but we do want a clear error message
+// if old code happens to try using one
+['message_resonance', 'question_and_answer'].forEach(function(serviceName) {
+  Object.defineProperty(watson, serviceName, {
+    enumerable: false,
+    configurable: true,
+    writable: true,
+    value: function() {
+      throw new Error('The ' + serviceName + ' service is no longer available');
+    }
+  });
+});
 
 module.exports = watson;