fix test for single node

Author: Samiul-TheSoccerFan

x-pack/plugin/esql/qa/server/src/main/java/org/elasticsearch/xpack/esql/qa/rest/SemanticMatchTestCase.java

@@ -60,8 +60,6 @@ public void testCopyToWithSemanticText() throws IOException {
         request.setJsonEntity("{\"text_field\": \"inference test\"}");
         assertEquals(201, adminClient().performRequest(request).getStatusLine().getStatusCode());
 
-        ensureGreen("test-semantic4");
-
         String query = """
             from test-semantic4
             """;