Update README.md

Author: wangzhzh

README.md

@@ -43,16 +43,4 @@ flutter pub get
 
 ## License
 
-Copyright 2015－2024 Sensors Data Inc.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
+[License 协议](https://github.com/sensorsdata/sensors_analytics_flutter_plugin/blob/master/LICENSE)