Check your modules **requirejs-config.js**. Probably there is mapping like

`"Magento_Checkout/js/view/billing-address": "Vendor_ModuleName/js/view/billing-address",`

Then later Requirejs try to load all files that have **Magento_Checkout/js/view/billing-address** from module where this file doesn't exists. 

One option is to add to requirejs-config.js of the module extra line (instead of copying the list.js file to this module)

`"Magento_Checkout/js/view/billing-address/list": "Magento_Checkout/js/view/billing-address/list",`