Remove duplicated release document (#56)

fix #55

dev/release/README.md

@@ -16,46 +16,4 @@
 
 # Release
 
-## How to release
-
-Create an issue for new release such as "Prepare X.Y.Z". See
-https://github.com/datafusion-contrib/datafusion-c/issues/49 as an
-example.
-
-Prepare new release:
-
-```bash
-git switch -c prepare-X.Y.Z
-dev/release/prepare.sh X.Y.Z
-editor doc/source/news/X.Y.Z.md
-git add doc/source/news/X.Y.Z.md
-git commit
-git push origin prepare-X.Y.Z
-```
-
-Open a pull request from the `prepare-X.Y.Z` branch.
-
-Merge the pull request.
-
-Tag `X.Y.Z`:
-
-```bash
-git clone git@github.com:datafusion-contrib/datafusion-c.git
-cd datafusion-c
-dev/release/tag.sh
-```
-
-Wait about 30 minutes for all artifacts are built and uploaded to a
-release page. For example,
-https://github.com/datafusion-contrib/datafusion-c/releases/tag/21.0.0
-is the release page for 21.0.0.
-
-Publish packages for Debian, Ubuntu and AlmaLinux:
-
-```bash
-cd package
-rake apt:rc
-rake yum:rc
-rake apt:release
-rake yum:release
-```
+See https://datafusion-contrib.github.io/datafusion-c/main/developer/release.html .