fixed a0686a46 from https://gitee.com/wkljy/docs/pulls/13832

want文档错误
Signed-off-by: Nwangkailong <wangkailong6@huawei.com>
Change-Id: I71eee990cf1bcf216c8d0e09ff2eca8230d991b7

zh-cn/application-dev/application-models/ability-startup-with-implicit-want.md

@@ -60,13 +60,7 @@
            } catch (error) {
                console.info(`explicit start ability failed with ${error.code}`)
            }
-           let context = getContext(this) as common.UIAbilityContext;
-           await context.startAbility(want)
-           console.info(`explicit start ability succeed`)
-       } catch (error) {
-           console.info(`explicit start ability failed with ${error.code}`)
-       }
-   }
+        }
    ```
 
      匹配过程如下：