chore(build): removed stub data

demo/src/assets/json/versions.json

-[{"version":"Current","url":"ngx-bootstrap","unprefixedUrl":""},{"version":"1.8.5","url":"ngx-bootstrap/old/1.8.5","unprefixedUrl":"old/1.8.5"}]
+[]

demo/src/ng-api-doc.ts

@@ -1808,6 +1808,11 @@ export const ngdoc: any = {
         "type": "string | TemplateRef<any>",
         "description": "<p>Content to be displayed as popover.</p>\n"
       },
+      {
+        "name": "popoverContext",
+        "type": "any",
+        "description": "<p>Context to be used if popover is a template.</p>\n"
+      },
       {
         "name": "popoverTitle",
         "type": "string",