Make License detectable by github

Author: zihejia

LICENSE

@@ -1,16 +1,5 @@
 Copyright 2022 Mixpanel, Inc.
 
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this work except in compliance with the License.
-You may obtain a copy of the License below, or 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.
 
                                  Apache License
                            Version 2.0, January 2004