Remove excessive data handling & some unused variables

[eileenmcnaughton]

Overview

Remove excessive data handling & some unused variables

Before

This form, but other forms, has special handling to use the email as the display name in emails if the display name is a single space

After

We use the display name as saved

Technical Details

This feels like code in the wrong place for something that is a non issue. If we were really worried we need to fix when saving to display name

Comments

Unused variables

[civibot]

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[larssandergreen]

Looks good to me.