Move out main re-resolution

Author: GeoffreyBooth

lib/internal/modules/run_main.js

@@ -79,10 +79,9 @@ function shouldUseESMLoader(mainPath) {
 function runMainESM(mainPath) {
   const { loadESM } = require('internal/process/esm_loader');
   const { pathToFileURL } = require('internal/url');
+  const main = pathToFileURL(mainPath).href;
 
   handleMainPromise(loadESM((esmLoader) => {
-    const main = path.isAbsolute(mainPath) ?
-      pathToFileURL(mainPath).href : mainPath;
     return esmLoader.import(main, undefined, { __proto__: null });
   }));
 }