Remove more code and perf wins

[blakeembrey]

Cleaning up and reducing some more code paths.

[blakeembrey]

This was negligible and added complexity, removing.

[blakeembrey]

Before:

> /Users/blakeembrey/.n/bin/node benchmark/parse-top.js

  cookie.parse - top sites

  15 tests completed.

  parse accounts.google.com x    12,372,758 ops/sec ±0.42% (194 runs sampled)
  parse apple.com           x    12,568,995 ops/sec ±0.72% (188 runs sampled)
  parse cloudflare.com      x    11,931,561 ops/sec ±0.35% (196 runs sampled)
  parse docs.google.com     x    11,406,060 ops/sec ±0.30% (195 runs sampled)
  parse drive.google.com    x    11,407,974 ops/sec ±0.28% (195 runs sampled)
  parse en.wikipedia.org    x     2,183,413 ops/sec ±0.43% (196 runs sampled)
  parse linkedin.com        x     2,504,458 ops/sec ±0.56% (195 runs sampled)
  parse maps.google.com     x     5,811,363 ops/sec ±0.35% (192 runs sampled)
  parse microsoft.com       x     4,165,492 ops/sec ±0.24% (193 runs sampled)
  parse play.google.com     x    11,288,231 ops/sec ±0.77% (192 runs sampled)
  parse support.google.com  x     6,936,106 ops/sec ±0.31% (195 runs sampled)
  parse www.google.com      x     4,654,382 ops/sec ±0.24% (195 runs sampled)
  parse youtu.be            x     2,150,212 ops/sec ±0.29% (191 runs sampled)
  parse youtube.com         x     2,168,764 ops/sec ±0.25% (196 runs sampled)
  parse example.com         x 1,015,740,156 ops/sec ±0.23% (196 runs sampled)

> /Users/blakeembrey/.n/bin/node benchmark/parse.js

  cookie.parse - generic

  6 tests completed.

  simple      x 14,838,760 ops/sec ±1.44% (194 runs sampled)
  decode      x  5,159,621 ops/sec ±0.37% (196 runs sampled)
  unquote     x 14,147,216 ops/sec ±0.36% (196 runs sampled)
  duplicates  x  3,946,673 ops/sec ±0.24% (197 runs sampled)
  10 cookies  x  1,159,556 ops/sec ±0.27% (196 runs sampled)
  100 cookies x     83,567 ops/sec ±0.44% (196 runs sampled)

After:

> /Users/blakeembrey/.n/bin/node benchmark/parse-top.js

  cookie.parse - top sites

  15 tests completed.

  parse accounts.google.com x     9,906,374 ops/sec ±0.40% (192 runs sampled)
  parse apple.com           x    14,517,233 ops/sec ±0.38% (195 runs sampled)
  parse cloudflare.com      x    12,549,506 ops/sec ±0.36% (195 runs sampled)
  parse docs.google.com     x    11,833,067 ops/sec ±0.28% (196 runs sampled)
  parse drive.google.com    x    11,850,144 ops/sec ±0.28% (196 runs sampled)
  parse en.wikipedia.org    x     2,243,009 ops/sec ±0.27% (193 runs sampled)
  parse linkedin.com        x     2,584,784 ops/sec ±0.28% (196 runs sampled)
  parse maps.google.com     x     6,023,326 ops/sec ±0.29% (196 runs sampled)
  parse microsoft.com       x     4,113,704 ops/sec ±0.28% (194 runs sampled)
  parse play.google.com     x    11,830,837 ops/sec ±0.28% (197 runs sampled)
  parse support.google.com  x     6,963,010 ops/sec ±0.31% (196 runs sampled)
  parse www.google.com      x     4,606,831 ops/sec ±1.37% (197 runs sampled)
  parse youtu.be            x     2,167,224 ops/sec ±0.24% (197 runs sampled)
  parse youtube.com         x     2,172,019 ops/sec ±0.28% (194 runs sampled)
  parse example.com         x 1,018,534,641 ops/sec ±0.25% (197 runs sampled)

> /Users/blakeembrey/.n/bin/node benchmark/parse.js

  cookie.parse - generic

  6 tests completed.

  simple      x 14,448,205 ops/sec ±0.46% (194 runs sampled)
  decode      x  5,128,678 ops/sec ±0.37% (193 runs sampled)
  unquote     x 13,934,772 ops/sec ±0.39% (196 runs sampled)
  duplicates  x  3,914,881 ops/sec ±0.60% (194 runs sampled)
  10 cookies  x  1,123,799 ops/sec ±0.30% (194 runs sampled)
  100 cookies x     86,013 ops/sec ±0.42% (196 runs sampled)

Hard to tell the difference over many runs, seems similar either way but hasOwnProperty would be more technically correct.