Remove rules_cc from gitsync (#671)
Remove rules_cc from gitsync (#671)

Copybara will sync rules_cc between GoB and GitHub, so we don't need to use gitsync for it any longer.
bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration