Remove unused variable

[Quy]

Summary of Changes

Remove $fullWidth as it is not being used.

Testing Instructions

Code review.

[richard67]

I have tested this item ✅ successfully on df6cc4b

I can confirm that the variable is not used anywhere in J3 core.

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[alikon]

I have tested this item ✅ successfully on df6cc4b

code review

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[alikon]

RTC

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[brianteeman]

I am wary of this being committed in a patch release

[alikon]

i'm afraid we will only have 3.10 .... what i'm missing ?

[SharkyKZ]

It's just a local variable. Fine to go in 3.9.xx.

[infograf768]

As we have been living with it since 3.0.0 without any side effects and @HLeithner wants to minimize changes in the stable vs RC, let's just merge in 3.10.0 ;)

[wilsonge]

Thanks!