Remove unused config option.

Author: dlongley

lib/config.js

@@ -18,18 +18,6 @@ cfg.caches = {
   }
 };
 
-// document loader configuration for the issuer; all issuer instances
-// will securely load DID documents using `bedrock-did-io` and any contexts
-// that have been specifically added to them; these config options below
-// also allow any issuer instance to optionally load `http` and `https`
-// documents directly from the Web
-cfg.documentLoader = {
-  // `true` enables all issuers to fetch `http` documents from the Web
-  http: false,
-  // `true` enables all issuers to fetch `https` documents from the Web
-  https: false
-};
-
 cfg.routes = {
   credentialsStatus: '/credentials/status',
   statusLists: '/status-lists'