removed concept expansion service

Author: germanattanasio

README.md

@@ -18,7 +18,6 @@ APIs and SDKs that use cognitive computing to solve complex problems.
     * [Alchemy Language](#alchemy-language)
     * [Alchemy Vision](#alchemy-vision)
     * [Alchemy Data News](#alchemy-data-news)
-    * [Concept Expansion](#concept-expansion)
     * [Concept Insights](#concept-insights)
     * [Dialog](#dialog)
     * [Document Conversion](#document-conversion)
@@ -154,33 +153,6 @@ DocumentsResult result = service.getNewsDocuments(params);
 System.out.println(result);
 ```
 
-### Concept Expansion
-Map euphemisms or colloquial terms to more commonly understood phrases using
-the [Concept Expansion][concept_expansion] service.
-Example: Create a job, wait for it to finish, and then retrieve results.
-
-```java
-ConceptExpansion service = new ConceptExpansion();
-service.setUsernameAndPassword("<username>", "<password>");
-
-String[] seeds = new String[] {"nyc", "dc", "london", "big cities"};
-String label = "demo";
-
-Job job = service.createJob(label, seeds);
-
-while (service.getJobStatus(job) == Job.Status.AWAITING_WORK
-    || service.getJobStatus(job) == Job.Status.IN_FLIGHT) {
-  try {
-    Thread.sleep(4000);
-  } catch (final InterruptedException e) {
-    e.printStackTrace();
-  }
-}
-
-System.out.println(service.getJobResult(job));
-```
-
-
 ### Concept Insights
 Use the [Concept Insights][concept_insights] service to identify words in the text that
 correspond to concepts in a Wikipedia graph.