test: delete invalid http test

The test is no longer valid for the original scenario.

It now fails intermittently because of two other issues:
1. Since the client is only processing one readable event, the
   client request is not enough to keep the process alive and the
   process can exit before the desired events have been raised.
2. Reading just 1 byte is not enough to guarantee that the parser
   will eventually consume all the data and raise the desired
   parse error. I tried postponing the server.close() to address
   the issue at [1], but then the test just hangs sometimes.

test/simple/test-http-client-parser-double-free.js

@@ -1,61 +0,0 @@
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-var common = require('../common');
-var assert = require('assert');
-var http = require('http');
-var http_common = require('_http_common');
-
-var receivedError = 0;
-var receivedClose = 0;
-
-var buf = new Buffer(64 * 1024);
-buf.fill('A');
-
-var server = http.createServer(function(req, res) {
-  res.write(buf, function() {
-    res.socket.write(buf);
-    res.end(function() {
-      req.socket.destroy();
-      server.close();
-    });
-  });
-}).listen(common.PORT, function() {
-  var req = http.request({ port: common.PORT, agent: false }, function(res) {
-    res.once('readable', function() {
-      /* read only one buffer */
-      res.read(1);
-    });
-  });
-  req.end();
-  req.on('close', function() {
-    receivedClose++;
-  });
-  req.on('error', function() {
-    receivedError++;
-  });
-});
-
-process.on('exit', function() {
-  assert.equal(receivedError, 1);
-  assert.equal(receivedClose, 1);
-  assert.equal(http_common.parsers.list.length, 2);
-});