[5.3] Remove unnecessary array internal pointer resets

[janschoenherr]

Code cleanup reported by PhpStorm inspections. The internal pointer is already set to the first element.

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[joomdonation]

I have tested this item ✅ successfully on f814966

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[QuyTon]

I have tested this item ✅ successfully on f814966

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/44881.}

[QuyTon]

RTC

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/44881.}