!6233 翻译完成 5777：删除无效return NULL

Merge pull request !6233 from ester.zhou/TR-5777

en/device-dev/guide/device-wlan-led-control.md

@@ -6,7 +6,7 @@ Based on the Hi3861 platform, the OpenHarmony WLAN module provides abundant peri
 
 ## Development<a name="section13857170163412"></a>
 
-1.  Complete the operations described in  [Getting Started with Hi3861](../quick-start/quickstart-lite-introduction-hi3861.md#section19352114194115).
+1.  Complete the operations described in [Getting Started with Hi3861](../quick-start/quickstart-lite-overview.md).
 
     LED control examples are stored in the file **applications/sample/wifi-iot/app/iothardware/led\_example.c**.
 
@@ -73,7 +73,6 @@ Based on the Hi3861 platform, the OpenHarmony WLAN module provides abundant peri
                     break;
             }
         }
-        return NULL;
     }
     ```
 
@@ -97,7 +96,7 @@ Based on the Hi3861 platform, the OpenHarmony WLAN module provides abundant peri
 
 ## Verification<a name="section1949121910344"></a>
 
-For details about the compilation and burning processes, see  [Building Source Code](../quick-start/quickstart-lite-steps-hi3861-connection.md#section191121332125319)  and  [Burning Images](../quick-start/quickstart-lite-steps-hi3861-connection.md#section3288165814218)  in the  _Getting Started with Hi3861_.
+For details about the compilation and burning processes, see [Building](../quick-start/quickstart-lite-steps-hi3861-building.md) and [Burning](../quick-start/quickstart-lite-steps-hi3861-burn.md).
 
 After the preceding two steps are complete, press the **RST** button to reset the module. If the LED blinks periodically as expected, the verification is passed.