[KYUUBI #6068] Remove community section from user docs

# 🔍 Description
## Issue References 🔗

## Describe Your Solution 🔧

The content of the community section is a bylaw, which is settled on the website.

This PR removes it and moves the release guide into the contributing fold for the moment.

The release guide is also bylaw which is suite better in website repo.

## Types of changes 🔖

- [ ] Bugfix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing functionality to change)

## Test Plan 🧪

#### Behavior Without This Pull Request ⚰️

#### Behavior With This Pull Request 🎉

#### Related Unit Tests

---

# Checklist 📝

- [x] This patch was not authored or co-authored using [Generative Tooling](https://www.apache.org/legal/generative-tooling.html)

**Be nice. Be informative.**

Closes #6068 from yaooqinn/community.

Closes #6068

8e18da63f [Kent Yao] Remove community section from user docs

Authored-by: Kent Yao <yao@apache.org>
Signed-off-by: Cheng Pan <chengpan@apache.org>

CONTRIBUTING.md

@@ -61,3 +61,9 @@ TBD, please be patient for the surprise.
 ## IDE Setup Guide
 
 [IntelliJ IDEA Setup Guide](https://kyuubi.readthedocs.io/en/master/contributing/code/idea_setup.html)
+
+## Contributor Avatars
+
+<a href="https://github.com/apache/kyuubi/graphs/contributors">
+  <img src="https://contrib.rocks/image?repo=apache/kyuubi&max=1024" />
+</a>

docs/community/CONTRIBUTING.md

@@ -1 +0,0 @@
-../../CONTRIBUTING.md

docs/community/collaborators.md

@@ -1,22 +0,0 @@
-<!--
-- Licensed to the Apache Software Foundation (ASF) under one or more
-- contributor license agreements.  See the NOTICE file distributed with
-- this work for additional information regarding copyright ownership.
-- The ASF licenses this file to You 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.
--->
-
-# Collaborators
-
-[PMC Members and Committers](https://people.apache.org/phonebook.html?project=kyuubi)
-
-See full contributor list at [contributors](https://github.com/apache/kyuubi/graphs/contributors).

docs/community/index.rst

@@ -1,27 +0,0 @@
-.. Licensed to the Apache Software Foundation (ASF) under one or more
-   contributor license agreements.  See the NOTICE file distributed with
-   this work for additional information regarding copyright ownership.
-   The ASF licenses this file to You 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.
-
-
-Community
-=========
-
-.. toctree::
-    :maxdepth: 2
-    :glob:
-
-    CONTRIBUTING
-    collaborators
-    release
-

docs/contributing/code/index.rst

@@ -30,3 +30,4 @@ code to the Kyuubi project.
     debugging
     developer
     idea_setup
+    release

docs/contributing/code/release.md

@@ -15,8 +15,7 @@
 - limitations under the License.
 -->
 
-Kyuubi Release Guide
-====================
+# Release Guide
 
 ## Introduction
 

docs/index.rst

@@ -221,12 +221,6 @@ What's Next
    contributing/code/index
    contributing/doc/index
 
-.. toctree::
-   :caption: Community
-   :maxdepth: 2
-
-   community/index
-
 .. toctree::
    :caption: Appendix
    :maxdepth: 2