remove dead TraversalContext code

lib/6to5/traversal/context.js

@@ -14,36 +14,13 @@ function TraversalContext(scope, opts, state) {
   this.scope = scope;
   this.state = state;
   this.opts  = opts;
-
-  this.reset();
 }
 
 TraversalContext.prototype.flatten = function () {
   this.shouldFlatten = true;
 };
 
-TraversalContext.prototype.remove = function () {
-  this.shouldRemove = true;
-  this.shouldSkip   = true;
-};
-
-TraversalContext.prototype.skip = function () {
-  this.shouldSkip = true;
-};
-
-TraversalContext.prototype.stop = function () {
-  this.shouldStop = true;
-  this.shouldSkip = true;
-};
-
-TraversalContext.prototype.reset = function () {
-  this.shouldRemove = false;
-  this.shouldSkip   = false;
-  this.shouldStop   = false;
-};
-
 TraversalContext.prototype.visitNode = function (node, obj, key) {
-  this.reset();
   var iteration = new TraversalPath(this, node, obj, key);
   return iteration.visit();
 };