Trim some extra merge commits that don't need to go into the split tree.
lrwxrwxrwx 14 git-subtree -> git-subtree.sh
-rwxr-xr-x 8596 git-subtree.sh
-rw-r--r-- 23 shellopts.sh
-rwxr-xr-x 3678 test.sh
-rw-r--r-- 247 todo