Common: delete accidental dead branch (Coverity)

CID 135586 in widget_hotkey_list: logically dead code

This code was added accidentally; it is both dead and unnecessary, and so was
removed.

common/widgets/widget_hotkey_list.cpp

@@ -436,8 +436,6 @@ void WIDGET_HOTKEY_LIST::OnSize( wxSizeEvent& aEvent )
 
     if( hk_column_width < HOTKEY_MIN_WIDTH )
         hk_column_width = HOTKEY_MIN_WIDTH;
-    else if( hk_column_width <= 0 )
-        hk_column_width = 1;
 
     int name_column_width = rect.width - hk_column_width - HORIZ_MARGIN;