ENYO-3969: Remove enyo-fit class from DataRepeaterSample.

Issue
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On touch devices, when you initially scroll the `DataRepeater` in the `DataRepeaterSample`, you can't scroll past the first screen initially (it does the overscroll bounce).

Fix
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The `enyo-fit` class set on the `DataRepeaterSample` kind was causing a `scrollWidth` equal to the size of the viewport to be returned for the scroller, so this class has been removed.

Enyo-DCO-1.1-Signed-off-by: Aaron Tam <aaron.tam@lge.com>