ENYO-261 Remove silence() to cover direct calling of setSelectedIndex()

When we call setSelectedIndex() directly, it block event bubbling before `active` object of ExpandablePicker is updated.

Enyo-DCO-1.1-Signed-off-by: David Um david.um@lge.com
Hi @DavidUM, did you also mean to remove L293 (and L285 to correspond with the removal of L272)?