delete _index file in influxql 2.1

content/influxdb/v2.1/query-data/_index.md

@@ -1,19 +0,0 @@
----
-title: Query data in InfluxDB
-seotitle: Query data stored in InfluxDB
-description: >
-  Learn to query data stored in InfluxDB using Flux and tools such as the InfluxDB
-  user interface and the 'influx' command line interface.
-aliases:
-  - /influxdb/v2.1/query_language/data_exploration/
-menu:
-  influxdb_2_1:
-    name: Query data
-weight: 5
-influxdb/v2.1/tags: [query, flux]
----
-
-Learn to query data stored in InfluxDB using Flux and tools such as the InfluxDB
-user interface and the 'influx' command line interface.
-
-{{< children >}}