Ignore .remix.config in files.listAsTree()

src/app/files.js

@@ -139,6 +139,11 @@ function Files (storage) {
 
     var self = this
     storage.keys().forEach(function (path) {
+      // NOTE: as a temporary measure do not show the config file
+      if (path === '.remix.config') {
+        return
+      }
+
       hashmapize(tree, path, {
         '/readonly': self.isReadOnly(path),
         '/content': self.get(path)