[Refactor] async: remove unnecessary slashes, since path.join adds them.

Author: ljharb

lib/async.js

@@ -126,10 +126,10 @@ module.exports = function resolve(x, options, callback) {
             fpkg = opts.package;
         }
 
-        var pkgfile = path.join(x, '/package.json');
+        var pkgfile = path.join(x, 'package.json');
         isFile(pkgfile, function (err, ex) {
             if (err) return cb(err);
-            if (!ex) return loadAsFile(path.join(x, '/index'), fpkg, cb);
+            if (!ex) return loadAsFile(path.join(x, 'index'), fpkg, cb);
 
             readFile(pkgfile, function (err, body) {
                 if (err) return cb(err);
@@ -148,13 +148,13 @@ module.exports = function resolve(x, options, callback) {
                     loadAsFile(path.resolve(x, pkg.main), pkg, function (err, m, pkg) {
                         if (err) return cb(err);
                         if (m) return cb(null, m, pkg);
-                        if (!pkg) return loadAsFile(path.join(x, '/index'), pkg, cb);
+                        if (!pkg) return loadAsFile(path.join(x, 'index'), pkg, cb);
 
                         var dir = path.resolve(x, pkg.main);
                         loadAsDirectory(dir, pkg, function (err, n, pkg) {
                             if (err) return cb(err);
                             if (n) return cb(null, n, pkg);
-                            loadAsFile(path.join(x, '/index'), pkg, cb);
+                            loadAsFile(path.join(x, 'index'), pkg, cb);
                         });
                     });
                     return;
@@ -169,13 +169,13 @@ module.exports = function resolve(x, options, callback) {
         if (dirs.length === 0) return cb(null, undefined);
         var dir = dirs[0];
 
-        var file = path.join(dir, '/', x);
+        var file = path.join(dir, x);
         loadAsFile(file, undefined, onfile);
 
         function onfile(err, m, pkg) {
             if (err) return cb(err);
             if (m) return cb(null, m, pkg);
-            loadAsDirectory(path.join(dir, '/', x), undefined, ondir);
+            loadAsDirectory(path.join(dir, x), undefined, ondir);
         }
 
         function ondir(err, n, pkg) {