ruby: drop some redundant includes
-rw-r--r-- 151 .hgignore
-rw-r--r-- 1587 .hgtags
-rw-r--r-- 2296 COPYING
-rw-r--r-- 1478 LICENSE
-rw-r--r-- 1787 README
-rwxr-xr-x 55184 SConstruct
drwxr-xr-x - build_opts
drwxr-xr-x - configs
drwxr-xr-x - ext
drwxr-xr-x - src
drwxr-xr-x - system
drwxr-xr-x - tests
drwxr-xr-x - util