[REF] Remove input format function from deprecated utils to the only place that calls it

[eileenmcnaughton]

Overview

Move code to more sensible place

Before

Code called by only one place on class called DeprecatedUtils

After

Code moved to it's calling function - this should be a good first step in cleaning it up & getting it under more testing

Technical Details

Comments

Minimal change made at this stage to the actual code

[civibot]

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[seamuslee001]

This looks like a sensible extraction don't think we need a test