response.etag: remove getter for now

until we figure out a good way to return both weak and strong validators

lib/response.js

@@ -339,17 +339,6 @@ Response.prototype = {
     this.set('ETag', val);
   },
 
-  /**
-   * Get the ETag of a response.
-   *
-   * @return {String}
-   * @api public
-   */
-
-  get etag() {
-    return this.get('etag');
-  },
-
   /**
    * Return the request mime type void of
    * parameters such as "charset".

test/response/etag.js

@@ -19,10 +19,4 @@ describe('res.etag', function(){
     res.etag = 'asdf';
     res.header.etag.should.equal('"asdf"');
   })
-
-  it('should get the etag', function(){
-    var res = response();
-    res.set('etag', '"asdf"');
-    res.etag.should.equal('"asdf"');
-  })
 })