fs: remove no-longer-relevant comment

[bengl]

The comment suggests that the subsequent code could by DRYed up, due to
simply passing arguments along. However, in the commits since then, this
no longer appears to apply, and so the comment is now confusing with
respect to the current code.

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• commit message follows commit guidelines

Affected core subsystem(s)

fs

[refack]

Context: written in 1 Mar 2010 by @ry -

node/lib/fs.js

Lines 59 to 69 in 810882c

	// Yes, the follow could be easily DRYed up but I provide the explicit
	// list to make the arguments clear.
	exports.close = function (fd, callback) {
	process.fs.close(fd, callback || noop);
	};
	exports.closeSync = function (fd) {
	return process.fs.close(fd);
	};

[jasnell]

LGTM, this does not need to wait the 48 hours to land

[jasnell]

Landed in 3e14449