Remove logger field info from docs (#5281)

Logger field is removed from the docs,
as it has been removed from the config file.

docs/config/README.md

@@ -83,16 +83,6 @@ export MINIO_DOMAIN=mydomain.com
 minio server /data
 ```
 
-#### Logger
-|Field|Type|Description|
-|:---|:---|:---|
-|``logger ``| |Server logs errors and fatal messages via logger. You may enable one or more loggers at the same time.|
-|``logger.console``| |Send log messages to console.|
-|``logger.console.enable``| _bool_ | Enable or disable console logger. Default is set to _true_.|
-|``logger.file``| |Send log message to a file.|
-|``logger.file.enable``| _bool_ | Enable or disable file logger. Default is set to _false_.|
-|``logger.file.filename``| _string_ | Path and name of the log file. Example: _/var/log/minio.log_ |
-
 #### Notify
 |Field|Type|Description|
 |:---|:---|:---|

docs/config/config.sample.json

@@ -1,20 +1,12 @@
 {
-    "version": "16",
+    "version": "21",
     "credential": {
         "accessKey": "USWUXHGYZQYFYFFIT3RE",
         "secretKey": "MOJRH0mkL1IPauahWITSVvyDrQbEEIwljvmxdq03"
     },
     "region": "us-east-1",
     "browser": "on",
-    "logger": {
-        "console": {
-            "enable": true
-        },
-        "file": {
-            "enable": false,
-            "filename": ""
-        }
-    },
+    "domain": "",
     "notify": {
         "amqp": {
             "1": {
@@ -106,6 +98,17 @@
                 "password": "password",
                 "database": "miniodb"
             }
+        },
+        "mqtt": {
+            "1": {
+                "enable": false,
+                "broker": "tcp://localhost:1883",
+                "topic": "minio",
+                "qos": 1,
+                "clientId": "minio",
+                "username": "",
+                "password": ""
+            }
         }
     }
 }