no more additions currently, the new client has the same functionality as the old.

Closes spring-projects#2155

Author: sothawo

src/main/java/org/springframework/data/elasticsearch/client/elc/RequestConverter.java

@@ -241,8 +241,6 @@ public PutMappingRequest indicesPutMappingRequest(IndexCoordinates indexCoordina
 		builder.index(Arrays.asList(indexCoordinates.getIndexNames()));
 		addPropertiesToMapping(builder, mapping);
 
-		// TODO #2155 what else to add
-
 		return builder.build();
 	}