Clean up obselete 'version' tag from docker-compose files (jaegertracing#5826)

## Description of the changes
- As the latest updates in docker compose has deprecated the 'version'
tag.This Pr aims to cleanup the version tags in the various
docker-compose files so as to cleanup the log currently displaying
```'version' is obselete ``` when we run a docker-compose file.

## Checklist
- [ ✅ ] I have read
https://github.com/jaegertracing/jaeger/blob/master/CONTRIBUTING_GUIDELINES.md
- [ ✅  ] I have signed all commits
- [ ❌] I have added unit tests for the new functionality
- [ ✅ ] I have run lint and test steps successfully
  - for `jaeger`: `make lint test`
  - for `jaeger-ui`: `yarn lint` and `yarn test`

Signed-off-by: vvs-personalstash <[email protected]>
Signed-off-by: Jared Tan <[email protected]>

Author: vvs-personalstash

cmd/tracegen/docker-compose.yml

@@ -1,5 +1,3 @@
-version: '2'
-
 services:
     jaeger:
       image: jaegertracing/all-in-one:latest

crossdock/docker-compose.yml

@@ -1,5 +1,3 @@
-version: '2'
-
 services:
     crossdock:
         image: crossdock/crossdock

crossdock/jaeger-docker-compose.yml

@@ -1,5 +1,3 @@
-version: '2'
-
 services:
     jaeger-remote-storage:
       image: jaegertracing/jaeger-remote-storage

docker-compose/cassandra/v3/docker-compose.yaml

@@ -1,5 +1,3 @@
-version: '3.8'
-
 services:
   cassandra:
     image: cassandra:3.11

docker-compose/cassandra/v4/docker-compose.yaml

@@ -1,5 +1,3 @@
-version: '3.8'
-
 services:
   cassandra:
     image: cassandra:4.1

docker-compose/elasticsearch/v6/docker-compose.yml

@@ -1,5 +1,3 @@
-version: '3.8'
-
 services:
   elasticsearch:
     image: docker.elastic.co/elasticsearch/elasticsearch-oss:6.8.23

docker-compose/elasticsearch/v7/docker-compose.yml

@@ -1,5 +1,3 @@
-version: '3.8'
-
 services:
   elasticsearch:
     image: docker.elastic.co/elasticsearch/elasticsearch:7.17.22

docker-compose/elasticsearch/v8/docker-compose.yml

@@ -1,5 +1,3 @@
-version: '3.8'
-
 services:
   elasticsearch:
     image: docker.elastic.co/elasticsearch/elasticsearch:8.14.1

docker-compose/jaeger-docker-compose.yml

@@ -1,5 +1,3 @@
-version: '2'
-
 services:
     hotrod:
       image: jaegertracing/example-hotrod:latest

docker-compose/kafka-integration-test/docker-compose.yml

@@ -1,5 +1,3 @@
-version: '3.8'
-
 services:
   kafka:
     image: bitnami/kafka:3.7.0