Remove CSS list-style

sky/engine/core/css/CSSProperties.in

 // This file specifies all the CSS properties we support and the necessary
 // information for our code generation. The various supported arguments
 // are described below with example usage
 
 // We should remove all those marked OBSOLETE now
 // We should remove all those marked LAYOUT once we have custom layout
 // We should remove all those marked ANIMATIONS once we have an animation system
 
 // - alias_for=other-property
 // Properties specifying alias_for do not get their own enum and instead map
@@ skipping 173 matching lines @@
 image-rendering inherited
 
 // LAYOUT
 justify-content
 
 // LAYOUT
 left animatable, initial=initialOffset, converter=convertLengthOrAuto
 
 letter-spacing animatable, inherited, initial=initialLetterWordSpacing, converter=convertSpacing
 
-// OBSOLETE
-list-style-image animatable, inherited, custom_value
-
-// OBSOLETE
-list-style-position inherited
-
-// OBSOLETE
-list-style-type inherited
-
 // LAYOUT
 margin-bottom animatable, initial=initialMargin, converter=convertLengthOrAuto
 
 // LAYOUT
 margin-left animatable, initial=initialMargin, converter=convertLengthOrAuto
 
 // LAYOUT
 margin-right animatable, initial=initialMargin, converter=convertLengthOrAuto
 
 // LAYOUT
@@ skipping 313 matching lines @@
 border-style longhands=border-top-style;border-right-style;border-bottom-style;border-left-style
 border-top longhands=border-top-width;border-top-style;border-top-color
 border-width longhands=border-top-width;border-right-width;border-bottom-width;border-left-width
 
 // LAYOUT
 flex longhands=flex-grow;flex-shrink;flex-basis
 
 // LAYOUT
 flex-flow longhands=flex-direction;flex-wrap
 
-list-style longhands=list-style-type;list-style-position;list-style-image
 margin longhands=margin-top;margin-right;margin-bottom;margin-left
 outline longhands=outline-color;outline-style;outline-width
 overflow longhands=overflow-x;overflow-y
 padding longhands=padding-top;padding-right;padding-bottom;padding-left
 animation longhands=animation-name;animation-duration;animation-timing-function;animation-delay;animation-iteration-count;animation-direction;animation-fill-mode;animation-play-state
 -webkit-border-after longhands=-webkit-border-after-width;-webkit-border-after-style;-webkit-border-after-color
 -webkit-border-before longhands=-webkit-border-before-width;-webkit-border-before-style;-webkit-border-before-color
 -webkit-border-end longhands=-webkit-border-end-width;-webkit-border-end-style;-webkit-border-end-color
 // "-webkit-border-radius: 1px 2px" behaves as "border-radius: 1px / 2px"
 -webkit-border-radius longhands=border-top-left-radius;border-top-right-radius;border-bottom-right-radius;border-bottom-left-radius
 -webkit-border-start longhands=-webkit-border-start-width;-webkit-border-start-style;-webkit-border-start-color
 -webkit-text-emphasis longhands=-webkit-text-emphasis-style;-webkit-text-emphasis-color
 -webkit-text-stroke longhands=-webkit-text-stroke-width;-webkit-text-stroke-color
 -webkit-transform-origin longhands=-webkit-transform-origin-x;-webkit-transform-origin-y;-webkit-transform-origin-z
 transition longhands=transition-property;transition-duration;transition-timing-function;transition-delay