lint: remove unused function parameters

closes #245

Author: LuisEGR

lib/index.js

@@ -163,11 +163,11 @@
     if (method === 'OPTIONS') {
       // preflight
       headers.push(configureOrigin(options, req));
-      headers.push(configureCredentials(options, req));
-      headers.push(configureMethods(options, req));
+      headers.push(configureCredentials(options))
+      headers.push(configureMethods(options))
       headers.push(configureAllowedHeaders(options, req));
-      headers.push(configureMaxAge(options, req));
-      headers.push(configureExposedHeaders(options, req));
+      headers.push(configureMaxAge(options))
+      headers.push(configureExposedHeaders(options))
       applyHeaders(headers, res);
 
       if (options.preflightContinue) {
@@ -182,8 +182,8 @@
     } else {
       // actual response
       headers.push(configureOrigin(options, req));
-      headers.push(configureCredentials(options, req));
-      headers.push(configureExposedHeaders(options, req));
+      headers.push(configureCredentials(options))
+      headers.push(configureExposedHeaders(options))
       applyHeaders(headers, res);
       next();
     }