docker: remove chown the git repos on startup (refs #4996). (#5390)

docker/s6/gogs/setup

@@ -19,5 +19,4 @@ ln -sfn /data/gogs/data ./data
 # Backward Compatibility with Gogs Container v0.6.15
 ln -sfn /data/git /home/git
 
-chown -R git:git /data /app/gogs ~git/
 chmod 0755 /data /data/gogs ~git/