#150 drop DocumentViewRestController.getById

to fix:
java.lang.IllegalStateException: Ambiguous handler methods mapped for
HTTP path
'http://w101.metasfresh.com:8081/rest/api/documentView/540189/651ce3ad-6fdf-4b60-a994-de34cdd9344d/1002992':

{public de.metas.ui.web.window.datatypes.json.JSONDocument
de.metas.ui.web.view.DocumentViewAttributesRestController.getData(java.lang.String,int),
public de.metas.ui.web.window.datatypes.json.JSONDocument
de.metas.ui.web.view.DocumentViewRestController.getById(int,java.lang.String,java.lang.String)}

metasfresh-webui-api/src/main/java/de/metas/ui/web/view/DocumentViewRestController.java

@@ -173,22 +173,7 @@ public List<JSONDocument> getByIds(
 				.getByIds(documentIds);
 		return JSONDocument.ofDocumentViewList(result);
 	}
-
-	@GetMapping("/{viewId}/{id}")
-	public JSONDocument getById(
-			@PathVariable(PARAM_WindowId) final int adWindowId //
-			, @PathVariable("viewId") final String viewId//
-			, @PathVariable("id") final String idStr)
-	{
-		final DocumentId documentId = DocumentId.of(idStr);
-
-		final IDocumentView record = documentViewsRepo.getView(viewId)
-				.assertWindowIdMatches(adWindowId)
-				.getById(documentId);
-
-		return JSONDocument.ofDocumentView(record);
-	}
-
+
 	@GetMapping("/{viewId}/filter/{filterId}/attribute/{parameterName}/typeahead")
 	public JSONLookupValuesList getFilterParameterTypeahead(
 			@PathVariable(PARAM_WindowId) final int adWindowId //