docs: remove collaborative etiquette
docs: remove collaborative etiquette

Code of conduct was added as a separate file so no need in collaborative etiquette.
pnpm/pnpm,pnpm/pnpm,rstacruz/pnpm,rstacruz/pnpm,rstacruz/pnpm,pnpm/supi,pnpm/supi,pnpm/supi,pnpm/pnpm