feat(sgi): clean up redundant runtime config for sgi575

For sgi575, remove the fetch of SGI-575_cmn600.yml from binary
downloads path as this is already present within the corresponding
models directory.

Signed-off-by: Rohit Mathew <rohit.mathew@arm.com>
Change-Id: I0cc09941f29ab57d1efcb9696b8b515169fa80f2
1 file changed