module: remove unused code in module.js

Remove unnecessary condition in lib/module.js.

Refs: #18593 (comment)

PR-URL: #18768
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Gus Caplan <[email protected]>
Reviewed-By: Tobias Nießen <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: Richard Lau <[email protected]>
Reviewed-By: Benjamin Gruenbaum <[email protected]>

Author: Trott

lib/module.js

@@ -128,9 +128,6 @@ function readPackage(requestPath) {
     return false;
   }
 
-  if (json === '')
-    return packageMainCache[requestPath] = undefined;
-
   try {
     var pkg = packageMainCache[requestPath] = JSON.parse(json).main;
   } catch (e) {