BHV-757: Remove unnecessary call that stops hideTopOverlay job.

Issue
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A quick up-down causes the `selected` state of the up arrow to remain active indefinitely.

Fix
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There is a call to stop the `hideTopOverlay` job whenever the down (previous) arrow is pressed; this call does not seem to have any current effect and I could not find anything in the history related to this call being made to address another issue.

Enyo-DCO-1.1-Signed-off-by: Aaron Tam <aaron.tam@lge.com>