[CSS Shapes] Remove deprecated shapes

LayoutTests/csswg/contributors/adobe/submitted/shapes/shape-outside/resources/subpixel-utils.js

-var SubPixelLayout = (function() {
-    var SUBPIXELS_PER_PIXEL = 64;
-    var enabled = undefined;
-
-    function isEnabled()
-    {
-        if (enabled === undefined) {
-            var elem = document.createElement('div');
-            elem.style.setProperty('width', '4.5px');
-            document.body.appendChild(elem);
-            var bounds = elem.getBoundingClientRect();
-            enabled = (bounds.width != Math.floor(bounds.width));
-            document.body.removeChild(elem);
-        }
-        return enabled;
-    }
-
-    return {
-        isEnabled: isEnabled,
-        snapToLayoutUnit: function(f) {
-            return isEnabled() ? Math.floor(f * SUBPIXELS_PER_PIXEL) / SUBPIXELS_PER_PIXEL : Math.floor(f); // as in LayoutUnit(f).toFloat()
-        },
-        ceilSnapToLayoutUnit: function(f) {
-            return isEnabled() ? Math.ceil(f * SUBPIXELS_PER_PIXEL) / SUBPIXELS_PER_PIXEL : Math.ceil(f); // see ceiledLayoutUnit(), LayoutUnit.h
-        }
-    }
-}());