How can I redirect all images that look like this:

<http://site.com/subdir/a/b/c/image.jpg>

to something like this:

<http://site.com/a/b/c/image.jpg>

using htaccess rewrite rules. Only `http://site.com/subdir/` is fixed, the rest of the paths are variable (can change).

Basically I want to take out "subdir/" from the path...