The Short Version
No credible historical source documents a group specifically called "Khanna Coolies" operating as bicycle-riding food porters in Calcutta. While bicycles were widely used for deliveries and "coolie" was a common labor term in the city, these general facts do not establish the existence of this particular named group. Comprehensive food and cultural histories of Calcutta spanning centuries make no mention of them, and the claim appears to conflate plausible background conditions with an unverified specific assertion.