Update authutil.js

lib/authutil.js

@@ -30,15 +30,7 @@ function writeRegistryToFile(registryUrl, fileLocation) {
     }
     core.debug(`Setting auth in ${fileLocation}`);
     let newContents = '';
-    if (fs.existsSync(fileLocation)) {
-        const curContents = fs.readFileSync(fileLocation, 'utf8');
-        curContents.split(os.EOL).forEach((line) => {
-            // Add current contents unless they are setting the registry
-            if (!line.toLowerCase().startsWith('registry')) {
-                newContents += line + os.EOL;
-            }
-        });
-    }
+    
     // Remove http: or https: from front of registry.
     const authString = registryUrl.replace(/(^\w+:|^)/, '') + ':_authToken=${NODE_AUTH_TOKEN}';
     const registryString = scope