Clear wifi dependency

Clean the posix dependency.

Change-Id: If7072b492f4445e0ea3742a89ed592b221dcf6f8
Signed-off-by: NYilu Mao <yilu.myl@alibaba-inc.com>

components/drivers/peripheral/wifi/package.yaml

@@ -19,7 +19,6 @@ license: Apache license v2.0                        # <可选项> 源代码的
 depends:
   - base: master
   - vfs: master
-  - posix: master
 
 ## 第四部分：编译连接信息
 # build_config:                            # <可选项> 编译配置项