openwebrtc: Remove obsolete reference to Nirbheek's repo
openwebrtc: Remove obsolete reference to Nirbheek's repo

AlertMe/cerbero,EricssonResearch/cerbero,AlertMe/cerbero,ramaxlo/cerbero,AlertMe/cerbero,sdroege/cerbero,AlertMe/cerbero,multipath-rtp/cerbero,ramaxlo/cerbero,AlertMe/cerbero,multipath-rtp/cerbero,ramaxlo/cerbero,ramaxlo/cerbero,ikonst/cerbero,shoreflyer/cerbero,shoreflyer/cerbero,ikonst/cerbero,EricssonResearch/cerbero,EricssonResearch/cerbero,sdroege/cerbero,EricssonResearch/cerbero,EricssonResearch/cerbero,ramaxlo/cerbero,sdroege/cerbero,sdroege/cerbero,shoreflyer/cerbero,multipath-rtp/cerbero,shoreflyer/cerbero,ikonst/cerbero,multipath-rtp/cerbero,sdroege/cerbero,multipath-rtp/cerbero,ikonst/cerbero,shoreflyer/cerbero,ikonst/cerbero