Remove bundled Ruby queries

This removes the bundled Ruby queries since these queries are in a
CodeQL release now, so we should never find that the queries don't
exist.

Author: koesie10

extensions/ql-vscode/src/model-editor/queries/index.ts

@@ -1,7 +1,7 @@
-import { fetchExternalApisQuery as rubyFetchExternalApisQuery } from "./ruby";
 import type { Query } from "./query";
-import { QueryLanguage } from "../../common/query-language";
+import type { QueryLanguage } from "../../common/query-language";
 
 export const fetchExternalApiQueries: Partial<Record<QueryLanguage, Query>> = {
-  [QueryLanguage.Ruby]: rubyFetchExternalApisQuery,
+  // Right now, there are no bundled queries. However, if we're adding a new
+  // language for the model editor, we can add the query here.
 };