!2 [分布式硬件]示例代码更改

Merge pull request !2 from 史晓晓/master

zh-cn/application-dev/reference/apis/js-apis-device-manager.md

@@ -294,15 +294,11 @@ getTrustedDeviceList(): Promise<Array<DeviceInfo>>
 
 - 示例：
   ```js
-  try {
   dmInstance.getTrustedDeviceList().then((data) => {
     console.log('get trusted device info: ' + JSON.stringify(data));
     }).catch((err) => {
       console.error("getTrustedDeviceList errCode:" + err.code + ",errMessage:" + err.message);
   });
-  } catch (err) {
-      console.error("getTrustedDeviceList errCode:" + err.code + ",errMessage:" + err.message);
-  }
   ```
 
 ### getLocalDeviceInfoSync<sup>8+</sup>
@@ -371,15 +367,11 @@ getLocalDeviceInfo(): Promise&lt;DeviceInfo&gt;
 
 - 示例：
   ```js
-  try {
   dmInstance.getLocalDeviceInfo().then((data) => {
     console.log('get local device info: ' + JSON.stringify(data));
   }).catch((err) => {
     console.error("getLocalDeviceInfo errCode:" + err.code + ",errMessage:" + err.message);
   });
-  } catch (err) {
-    console.error("getLocalDeviceInfo errCode:" + err.code + ",errMessage:" + err.message);
-  }
   ```
 
 ### startDeviceDiscovery8+</sup>