Fluentd: remove unused configuration section

This removes an unused section of configuration for fluentd, as
well as cleans up the values for filtering fluentd logs

Change-Id: I0c58d3ac236af7723c64c3b9fcba877736b1f606

fluent-logging/values.yaml

@@ -237,23 +237,14 @@ conf:
         type: monitor_agent
         bind: 0.0.0.0
         port: 24220
-    - http_health_checking:
-        header: source
-        type: http
-        bind: 0.0.0.0
-        port: 9880
     - fluentbit_forward:
         header: source
         type: forward
         port: "#{ENV['FLUENTD_PORT']}"
         bind: 0.0.0.0
-    - filter_fluentbit_logs:
-        header: match
-        expression: "fluent.**"
-        type: "null"
     - filter_fluentd_logs:
         header: match
-        expression: "fluentd.**"
+        expression: "fluent.**"
         type: "null"
       # NOTE(srwilkers): Look for specific keywords in the log key to determine
       # log level of event