Remove or deprecate unused annotation elements

- Remove the annotationPopover template which is not used anywhere
- Deprecate propertiees and methods that have been replaced by the Bioontology model:
  - Deprecate the bioportalLookupCache property in the AppModel
  - Deprecate the following methods from the LookupModel: bioportalGetConcepts, bioportalGetConceptsBatch, bioportalSearch, bioportalExpand

Issue #1874

src/js/models/AppModel.js

@@ -2131,8 +2131,8 @@ define(["jquery", "underscore", "backbone"], function ($, _, Backbone) {
            */
           bioportalApiBaseUrl: "https://data.bioontology.org",
           /**
-           * This attribute stores cache of ontology information that is looked up in Bioportal, so that duplicate REST calls don't need to be made.
-           * @type {object}
+           * Make use of the Bioontology model to cache the results of Bioportal API calls
+           * @deprecated since 0.0.0
            */
           bioportalLookupCache: {},
           /**

src/js/models/LookupModel.js

@@ -85,6 +85,7 @@ define(["jquery", "jqueryui", "underscore", "backbone"], function (
         });
       },
 
+      /** @deprecated */
       bioportalExpand: function (term) {
         // make sure we have something to lookup
         if (!MetacatUI.appModel.get("bioportalAPIKey")) {
@@ -151,6 +152,7 @@ define(["jquery", "jqueryui", "underscore", "backbone"], function (
         return terms;
       },
 
+      /** @deprecated */
       bioportalGetConcepts: function (uri, callback) {
         var concepts = this.get("concepts")[uri];
 
@@ -200,6 +202,7 @@ define(["jquery", "jqueryui", "underscore", "backbone"], function (
         });
       },
 
+      /** @deprecated */
       bioportalGetConceptsBatch: function (uris, callback) {
         // make sure we have something to lookup
         if (!MetacatUI.appModel.get("bioportalBatchUrl")) {