Web Inspector: remove unused references to TimelineCalculator

Web Inspector: remove unused references to TimelineCalculator
https://bugs.webkit.org/show_bug.cgi?id=83025

Reviewed by Yury Semikhatsky.

* inspector/front-end/TimelinePanel.js:
(WebInspector.TimelinePanel.prototype._refreshRecords):
(WebInspector.TimelinePanel.prototype._showPopover):
(WebInspector.TimelineRecordListRow.prototype.update):
* inspector/front-end/TimelinePresentationModel.js:
(WebInspector.TimelinePresentationModel.Record.prototype.generatePopupContent):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@113039 268f45cc-cd09-0410-ab3c-d52691b4dbfc