Update CODE_OF_CONDUCT.md

Signed-off-by: SJkar <tranduong22112010@gmail.com>

Author: JkarVN

CODE_OF_CONDUCT.md

@@ -40,10 +40,3 @@ Instances of abusive, harassing, or otherwise unacceptable behavior may be repor
 All complaints will be reviewed and investigated promptly and fairly.
 
 All community leaders are obligated to respect the privacy and security of the reporter of any incident.
-
-## Attribution
-
-This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 2.1, available at [https://www.contributor-covenant.org/version/2/1/code_of_conduct.html][v2.1].
-
-[homepage]: https://www.contributor-covenant.org
-[v2.1]: https://www.contributor-covenant.org/version/2/1/code_of_conduct.html