[BREAKING CHANGE] SelectFileWidget: Remove deprecated config 'dragDropUI'
[BREAKING CHANGE] SelectFileWidget: Remove deprecated config 'dragDropUI'

This was added in I6dfef09b94947d28032b9aae74fc922b1df4940a
and deprecated in Ieb66b56534dfe08df3307c7861dbe79daf30f7b4

Change-Id: I92f6de15fc1ef0784198ace14d9f562198aae85a

wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui