delete: remove outdated Java 17 instructions and community engagement section from README

Author: tae898

README.md

@@ -143,75 +143,3 @@ arcadedb.cite()
 ## 📄 License
 
 Both upstream ArcadeDB (Java) and this ArcadeDB Embedded Python project are licensed under Apache 2.0, which is fully open and free for everyone, including commercial use.
-
-Java 21 packages are available on [Maven central](https://repo.maven.apache.org/maven2/com/arcadedb/) and docker images on [Docker Hub](https://hub.docker.com/r/arcadedata/arcadedb).
-
-We also support Java 17 on a separate branch `java17` for those who cannot upgrade to Java 21 yet through GitHub packages.
-
-To use Java 17 inside your project, add the repository to your `pom.xml` and reference dependencies as follows:
-
-```xml
-    <repositories>
-        <repository>
-            <name>github</name>
-            <id>github</id>
-            <url>https://maven.pkg.github.com/ArcadeData/arcadedb</url>
-        </repository>
-    </repositories>
-    <dependencies>
-      <dependency>
-          <groupId>com.arcadedb</groupId>
-          <artifactId>arcadedb-engine</artifactId>
-          <version>25.5.1-java17</version>
-      </dependency>
-    </dependencies>
-```
-
-Docker images are available on ghcr.io too:
-
-```shell
-docker pull ghcr.io/arcadedata/arcadedb:25.5.1-java17
-```
-
-### Community
-
-Join our growing community around the world, for ideas, discussions and help regarding ArcadeDB.
-
-- Chat live with us on [Discord](https://discord.gg/w2Npx2B7hZ)
-- Follow us on [Twitter](https://twitter.com/arcade_db)
-- or on [Bluesky](https://bsky.app/profile/arcadedb.bsky.social)
-- Connect with us on [LinkedIn](https://www.linkedin.com/products/arcadedb)
-- or on [Facebook](https://www.facebook.com/arcadedb)
-- Questions tagged `#arcadedb` on [Stack Overflow](https://stackoverflow.com/questions/tagged/arcadedb)
-- View our official [Blog](https://blog.arcadedb.com/)
-
-### Security
-
-For security issues kindly email us at support@arcadedb.com instead of posting a public issue on GitHub.
-
-### License and Attribution
-
-ArcadeDB is Free for any usage and licensed under the liberal [Open Source Apache 2 license](LICENSE). If you need commercial
-support, or you need to have an issue fixed ASAP, check our [GitHub Sponsor page](https://github.com/sponsors/ArcadeData) on both
-Recurrent and One-Time tiers. All the sponsorship received will be distributed to the active contributors of this project.
-
-For third-party attributions and copyright notices, see:
-- [NOTICE](NOTICE) - Required legal attributions
-- [ATTRIBUTIONS.md](ATTRIBUTIONS.md) - Detailed third-party acknowledgments
-- [LICENSE](LICENSE) - Full license text
-
-### Thanks To
-
-<a href="https://www.yourkit.com"><img src="https://www.yourkit.com/images/yklogo.png"></a> for providing YourKit Profiler to our committers.
-
-### Contributing
-
-We would love for you to get involved with ArcadeDB project.
-If you wish to help, you can learn more about how you can contribute to this project in the [contribution guide](CONTRIBUTING.md).
-
-Have fun with data!
-
-The ArcadeDB Team
-
-## Stargazers over time
-[![Stargazers over time](https://starchart.cc/ArcadeData/arcadedb.svg?variant=adaptive)](https://starchart.cc/ArcadeData/arcadedb)