Remove icon-button's type prop's default.
Remove icon-button's type prop's default.

mrpau/kolibri,learningequality/kolibri,indirectlylit/kolibri,jonboiser/kolibri,DXCanas/kolibri,MingDai/kolibri,mrpau/kolibri,learningequality/kolibri,benjaoming/kolibri,lyw07/kolibri,MingDai/kolibri,benjaoming/kolibri,christianmemije/kolibri,indirectlylit/kolibri,DXCanas/kolibri,rtibbles/kolibri,learningequality/kolibri,jonboiser/kolibri,jonboiser/kolibri,lyw07/kolibri,benjaoming/kolibri,christianmemije/kolibri,DXCanas/kolibri,jonboiser/kolibri,mrpau/kolibri,MingDai/kolibri,learningequality/kolibri,DXCanas/kolibri,indirectlylit/kolibri,lyw07/kolibri,rtibbles/kolibri,rtibbles/kolibri,christianmemije/kolibri,indirectlylit/kolibri,mrpau/kolibri,lyw07/kolibri,christianmemije/kolibri,rtibbles/kolibri,MingDai/kolibri,benjaoming/kolibri