RecordArray#addRecord is unused

[bmac]

@igorT can this code be removed?

data/packages/ember-data/lib/system/record-arrays/record-array.js

Lines 121 to 136 in 6d6c646

	/**
	Adds a record to the `RecordArray` without duplicates
	@method addRecord
	@private
	@param {DS.Model} record
	@param {DS.Model} an optional index to insert at
	*/
	addRecord: function(record, idx) {
	var content = get(this, 'content');
	if (idx === undefined) {
	content.addObject(record);
	} else if (!content.contains(record)) {
	content.insertAt(idx, record);
	}
	},

[igorT]

do we use removeRecord?

[bmac]

yes

[sly7-7]

@bmac It turns out that recordArrayManager uses the deprecated _pushRecord. So I think this could be closed as soon as I remove the deprecated function