Macintosh: Which Shared Library Manager?

There are 2 extensions in my Extensions folder: the Shared Library Manager and the Shared Library Manager PPC. Does my computer require both files to function correctly, or can I remove one of them?
Many programs, extensions, and libraries, both by Apple and by other companies, rely on these extensions, and will not function if they are absent.

PowerPC-based computers require both the Shared Library Manager and the Shared Library Manager PPC extensions to be present. You should not remove either of them. This applies to all Macintosh computers with a PowerPC processor, including all Power Macintoshes, the iMac, the iBook, and the more recent Performas and PowerBooks.

Macintoshes with 680x0-series processors (generally manufactured in 1994 or earlier) only need the Shared Library Manager, and do not use the Shared Library Manager PPC.
Published Date: Feb 20, 2012