Revert refactoring of CSSProperty .in files

Source/build/scripts/css_properties.py

Index: Source/build/scripts/css_properties.py
diff --git a/Source/build/scripts/css_properties.py b/Source/build/scripts/css_properties.py
index cc4d9877975d769415be2d17ef0380bce203db49..83f2196354da92aabd215692ec1fcef6216ec9e5 100755
--- a/Source/build/scripts/css_properties.py
+++ b/Source/build/scripts/css_properties.py
@@ -9,10 +9,7 @@ from name_utilities import lower_first
 
 class CSSProperties(in_generator.Writer):
     defaults = {
-        'alias_for': None,
         'longhands': '',
-        'animatable': False,
-        'inherited': False,
         'font': False,
         'svg': False,
         'name_for_methods': None,
@@ -31,8 +28,6 @@ class CSSProperties(in_generator.Writer):
     }
 
     valid_values = {
-        'animatable': (True, False),
-        'inherited': (True, False),
         'font': (True, False),
         'svg': (True, False),
         'custom_all': (True, False),
@@ -48,18 +43,10 @@ class CSSProperties(in_generator.Writer):
 
         properties = self.in_file.name_dictionaries
 
-        self._aliases = {property['name']: property['alias_for'] for property in properties if property['alias_for']}
-        properties = [property for property in properties if not property['alias_for']]
-
-        assert len(properties) <= 1024, 'There are more than 1024 CSS Properties, you need to update CSSProperty.h/StylePropertyMetadata m_propertyID accordingly.'
-        # We currently assign 0 to CSSPropertyInvalid
-        self._first_enum_value = 1
-        for offset, property in enumerate(properties):
+        for property in properties:
             property['property_id'] = css_name_to_enum(property['name'])
             property['upper_camel_name'] = camelcase_css_name(property['name'])
             property['lower_camel_name'] = lower_first(property['upper_camel_name'])
-            property['enum_value'] = self._first_enum_value + offset
-            property['is_internal'] = property['name'].startswith('-internal-')
 
         self._properties_list = properties
         self._properties = {property['property_id']: property for property in properties}