Revert "tar: when using compressor, make sure event listener gets hooked to the proper stream."

This reverts commit 5c80a62.

Author: ctalkington

lib/plugins/tar.js

@@ -76,11 +76,7 @@ Tar.prototype.finalize = function() {
 };
 
 Tar.prototype.on = function() {
-  if (this.compressor) {
-    return this.compressor.on.apply(this.compressor, arguments);
-  } else {
-    return this.engine.on.apply(this.engine, arguments);
-  }
+  return this.engine.on.apply(this.engine, arguments);
 };
 
 Tar.prototype.pipe = function(destination, options) {