diff --git a/Committer-How-To.md b/Committer-How-To.md
index 74aaad5..37b5421 100644
--- a/Committer-How-To.md
+++ b/Committer-How-To.md
@@ -114,7 +114,6 @@ See [Building Ruby](https://docs.ruby-lang.org/en/master/contributing/building_r
   * Write as <code>[skip ci]</code> to skip Travis CI, if the commit only changes documents and you are sure.
   * Fold by 80 columns
   * You can command the Redmine in a commit message.
-     * [[redmine:VersionControlSystem]]
   * &#96;make change&#96; will write change.log which you can fill in and copy to commit message.
 
 ## Continuous Integration (CI)