Fixed an issue where io package was declared twice

codegens/golang/lib/index.js

@@ -238,7 +238,7 @@ self = module.exports = {
     }
     if (isFile) {
       codeSnippet += `${indent}"os"\n${indent}"path/filepath"\n`;
-      codeSnippet += `${indent}"io"\n`;
+
       // Setting isFile as false for further calls to this function
       isFile = false;
     }