chore: remove liscense

quickstart/docker/compose/grpc/echo.proto

@@ -1,18 +1,3 @@
-/*
- * Copyright 2021-2022 Aklivity Inc
- *
- * Licensed under the Aklivity Community License (the "License"); you may not use
- * this file except in compliance with the License.  You may obtain a copy of the
- * License at
- *
- *   https://www.aklivity.io/aklivity-community-license/
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OF ANY KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations under the License.
- */
-
 syntax = "proto3";
 
 package example;