Fix the example issue

Author: wyunchi-ms

src/Resources/Resources/help/Get-AzManagementGroupEntity.md

@@ -40,10 +40,8 @@ Name        : TestGroupChild
 TenantId    : 6b2064b9-34bd-46e6-9092-52f2dd5f7fc0
 DisplayName : TestGroupChildDisplayName
 ```
-This cmdlet get all the ManagementGroupEntity under this tenant.
 
-### CommonParameters
-This cmdlet supports the common parameters: -Debug, -ErrorAction, -ErrorVariable, -InformationAction, -InformationVariable, -OutVariable, -OutBuffer, -PipelineVariable, -Verbose, -WarningAction, and -WarningVariable. For more information, see [about_CommonParameters](http://go.microsoft.com/fwlink/?LinkID=113216).
+This cmdlet get all the ManagementGroupEntity under this tenant.
 
 ## PARAMETERS