remove redundant code (#283)

The check is already done above.

Author: lpinca

lib/convertLcovToCoveralls.js

@@ -99,9 +99,7 @@ const convertLcovToCoveralls = (input, options, cb) => {
     if (options.parallel) {
       postJson.parallel = options.parallel;
     }
-    if (options.flag_name) {
-      postJson.flag_name = options.flag_name;
-    }
+
     parsed.forEach(file => {
       file.file = cleanFilePath(file.file);
       const currentFilePath = path.resolve(filepath, file.file);