debian: Don't ship broken Scientific Linux branding symlinks
debian: Don't ship broken Scientific Linux branding symlinks

SL is based on RHEL; Debian/Ubuntu don't have these logos.

https://bugs.debian.org/925429

garrett/cockpit,garrett/cockpit,cockpituous/cockpit,martinpitt/cockpit,mvollmer/cockpit,martinpitt/cockpit,moraleslazaro/cockpit,deryni/cockpit,martinpitt/cockpit,cockpit-project/cockpit,cockpituous/cockpit,mvollmer/cockpit,garrett/cockpit,cockpituous/cockpit,cockpit-project/cockpit,cockpit-project/cockpit,moraleslazaro/cockpit,moraleslazaro/cockpit,deryni/cockpit,moraleslazaro/cockpit,deryni/cockpit,cockpit-project/cockpit,garrett/cockpit,moraleslazaro/cockpit,garrett/cockpit,mvollmer/cockpit,deryni/cockpit,mvollmer/cockpit,deryni/cockpit,mvollmer/cockpit,deryni/cockpit,martinpitt/cockpit,cockpituous/cockpit,deryni/cockpit,moraleslazaro/cockpit,moraleslazaro/cockpit,cockpit-project/cockpit,cockpituous/cockpit,martinpitt/cockpit,cockpituous/cockpit