Fixes #1850. Remove redundant test for details param.

[miketaylr]

This is already tested @

webcompat.com/tests/functional/reporting-non-auth.js

Lines 288 to 303 in 5b6cdd9

	"details param adds info to description": function() {
	return FunctionalHelpers.openPage(
	this,
	url("/issues/new?details=" + DETAILS_STRING),
	"#description"
	)
	.findByCssSelector("#steps_reproduce")
	.getProperty("value")
	.then(function(text) {
	assert.include(
	text,
	"Encountered error: NS_ERROR_DOM_MEDIA_DEMUXER_ERR (0x806e000c)\nLocation: virtual\nRefPtrMP4Demuxer::InitPromise mozilla::MP4Demuxer::Init()\nError information:\nIncomplete MP4 metadata\nMedia URL: file:///Users/potch/Documents/mozilla/media.mp4"
	);
	})
	.end();
	},

[miketaylr]

r? @zoepage

[zoepage]

LTGM.

[miketaylr]

Thanks.