fixed d4af66a from https://gitee.com/yzkp/docs/pulls/13858

connectServiceExtensionAbility 为非系统接口

Change-Id: I6e240c592438264a063d0e5d8acac1d1a94dd3d1
Signed-off-by: Nyangzk <yangzhongkai@huawei.com>

zh-cn/application-dev/reference/apis/js-apis-inner-application-uiAbilityContext.md

@@ -1378,8 +1378,6 @@ connectServiceExtensionAbility(want: Want, options: ConnectOptions): number;
 
 **系统能力**：SystemCapability.Ability.AbilityRuntime.Core
 
-**系统API**: 此接口为系统接口，三方应用不支持调用。
-
 **参数：**
 
 | 参数名 | 类型 | 必填 | 说明 |