svn : remove mistakenly added project files and directories within a directory

1. #Remove unnecessary files and directories by
2. svn rm file_or_directories
4. #e.g.
5. svn rm .settings //directory
6. svn rm .project //file
7. svn rm .git //directory
8. svn rm .idea //directory
10. #commit all changes
11. svn commit -m "Your remove message."