[ref] Remove reference symbol from 2 variables

[eileenmcnaughton]

Overview

Minor readability fix

Before

Variables passed by reference

After

Variables not passed by reference

Technical Details

I checked & these are not altered in the function - so passing by reference only adds confusion

Comments

[civibot]

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[colemanw]

Once upon a time there was a theory that php4 performed some fraction of a microsecond faster if you passed variables by reference because it didn't have to make a copy of them. Whether or not that was ever true, it resulted in some confusing code which serves as a lesson today to leave micro-optimizations up to the compiler.

[eileenmcnaughton]

@colemanw yeah Xavier researched & debunked than around 2011..