Stabilize vector store usage (#814)

* Remove experimental feature enabling

* Lint

Author: Strift

src/test/java/com/meilisearch/integration/SearchTest.java

@@ -1088,10 +1088,6 @@ public void testMultiSearchWithMergeFacets() {
 
     @Test
     public void testSimilarDocuments() throws Exception {
-        HashMap<String, Boolean> features = new HashMap();
-        features.put("vectorStore", true);
-        client.experimentalFeatures(features);
-
         String indexUid = "SimilarDocuments";
         Index index = client.index(indexUid);
         HashMap<String, Embedders> embedders = new HashMap<>();