CiviEvent Import - Remove broken call to parent constructor (dev/core#3932)

[brienneK]

Overview

Resolves Issue 3932 on lab.civicrm, in which the Event Participant Import attempts to call a parent constructor that does not exist

Before

Before this patch, when a user goes to Events > Import Participants, fills out the first screen and then clicks Continue they receive a critical error.

After

With this patch, when a user follows the above steps, they move on to the second screen of the import process (field mapping).

Technical Details

Removed line 68 within the __construct function (aka constructor) within Participant.php that attempted to call a constructor in CRM_Import_Parser, though one does not exist.

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[civibot]

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[kcristiano]

I've done an r-run and this works as expected. This looks good to merge.

[Freewindrider]

I've tested this successfully in a live-environment.
Thank you very much for your work on this.