docs/victorialogs/data-ingestion: removed FluentBit Elasticsearch from examples (VictoriaMetrics#7093)

removed FluentBit Elasticsearch example from docs as custom headers are
not supported by elasticsearch output till
fluent/fluent-bit#9416 is merged and released

fixes https://github.com/VictoriaMetrics/VictoriaMetrics/issues/6985

### Describe Your Changes

Please provide a brief description of the changes you made. Be as
specific as possible to help others understand the purpose and impact of
your modifications.

### Checklist

The following checks are **mandatory**:

- [ ] My change adheres [VictoriaMetrics contributing
guidelines](https://docs.victoriametrics.com/contributing/).

Author: AndrewChubatiuk

docs/VictoriaLogs/data-ingestion/Fluentbit.md

@@ -15,30 +15,9 @@ aliases:
 # Fluentbit setup
 
 VictoriaLogs supports given below Fluentbit outputs:
-- [Elasticsearch](#elasticsearch)
 - [Loki](#loki)
 - [HTTP JSON](#http)
 
-## Elasticsearch
-
-Specify [elasticsearch output](https://docs.fluentbit.io/manual/pipeline/outputs/elasticsearch) section in the `fluentbit.conf`
-for sending the collected logs to [VictoriaLogs](https://docs.victoriametrics.com/victorialogs/):
-
-```conf
-[Output]
-    Name es
-    Match *
-    host victorialogs
-    port 9428
-    compress gzip
-    path /insert/elasticsearch
-    header AccountID 0
-    header ProjectID 0
-    header VL-Stream-Fields path
-    header VL-Msg-Field log
-    header VL-Time-Field @timestamp
-```
-
 ## Loki
 
 Specify [loki output](https://docs.fluentbit.io/manual/pipeline/outputs/loki) section in the `fluentbit.conf`